premiere-libtorrent/ChangeLog

	* support 'explicit read cache' which keeps a specific set of pieces
	  in the read cache, without implicitly caching other pieces
	* support sending suggest messages based on what's in the read cache
	* clear sparse flag on files that complete on windows
	* support retry-after header for web seeds
	* replaced boost.filesystem with custom functions
	* replaced dependency on boost.thread by asio's internal thread primitives
	* added support for i2p torrents
	* cleaned up usage of MAX_PATH and related macros
	* made it possible to build libtorrent without RTTI support
	* added support to build with libgcrypt and a shipped version of libtommath
	* optimized DHT routing table memory usage
	* optimized disk cache to work with large caches

0.15 release

	* added support for explicitly flushing the disk cache
	* added torrent priority to affect bandwidth allocation for its peers
	* reduced the number of floating point operations (to better support
	  systems without FPU)
	* added new alert when individual files complete
	* added support for storing symbolic links in .torrent files
	* added support for uTorrent interpretation of multi-tracker torrents
	* handle torrents with duplicate filenames
	* piece timeouts are adjusted to download rate limits
	* encodes urls in torrent files that needs to be encoded
	* fixed not passing &supportcrypto=1 when encryption is disabled
	* introduced an upload mode, which torrents are switched into when
	  it hits a disk write error, instead of stopping the torrent.
	  this lets libtorrent keep uploading the parts it has when it
	  encounters a disk-full error for instance
	* improved disk error handling and expanded use of error_code in
	  error reporting. added a bandwidth state, bw_disk, when waiting
	  for the disk io thread to catch up writing buffers
	* improved read cache memory efficiency
	* added another cache flush algorithm to write the largest
	  contiguous blocks instead of the least recently used
	* introduced a mechanism to be lighter on the disk when checking torrents
	* applied temporary memory storage optimization to when checking
	  a torrent as well
	* removed hash_for_slot() from storage_interface. It is now implemented
	  by using the readv() function from the storage implementation
	* improved IPv6 support by announcing twice when necessary
	* added feature to set a separate global rate limit for local peers
	* added preset settings for low memory environments and seed machines
	  min_memory_usage() and high_performance_seeder()
	* optimized overall memory usage for DHT nodes and requests, peer
	  entries and disk buffers
	* change in API for block_info in partial_piece_info, instead of
	  accessing 'peer', call 'peer()'
	* added support for fully automatic unchoker (no need to specify
	  number of upload slots). This is on by default
	* added support for changing socket buffer sizes through
	  session_settings
	* added support for merkle hash tree torrents (.merkle.torrent)
	* added 'seed mode', which assumes that all files are complete
	  and checks hashes lazily, as blocks are requested
	* added new extension for file attributes (executable and hidden)
	* added support for unbuffered I/O for aligned files
	* added workaround for sparse file issue on Windows Vista
	* added new lt_trackers extension to exchange trackers between
	  peers
	* added support for BEP 17 http seeds
	* added read_piece() to read pieces from torrent storage
	* added option for udp tracker preference
	* added super seeding
	* added add_piece() function to inject data from external sources
	* add_tracker() function added to torrent_handle
	* if there is no working tracker, current_tracker is the
	  tracker that is currently being tried
	* torrents that are checking can now be paused, which will
	  pause the checking
	* introduced another torrent state, checking_resume_data, which
	  the torrent is in when it's first added, and is comparing
	  the files on disk with the resume data
	* DHT bandwidth usage optimizations
	* rate limited DHT send socket
	* tracker connections are now also subject to IP filtering
	* improved optimistic unchoke logic
	* added monitoring of the DHT lookups
	* added bandwidth reports for estimated TCP/IP overhead and DHT
	* includes DHT traffic in the rate limiter
	* added support for bitcomet padding files
	* improved support for sparse files on windows
	* added ability to give seeding torrents preference to active slots
	* added torrent_status::finished_time
	* automatically caps files and connections by default to rlimit
	* added session::is_dht_running() function
	* added torrent_handle::force_dht_announce()
	* added torrent_info::remap_files()
	* support min_interval tracker extension
	* added session saving and loading functions
	* added support for min-interval in tracker responses
	* only keeps one outstanding duplicate request per peer
	  reduces waste download, specifically when streaming
	* added support for storing per-peer rate limits across reconnects
	* improved fallocate support
	* fixed magnet link issue when using resume data
	* support disk I/O priority settings
	* added info_hash to torrent_deleted_alert

release 0.14.9

	* disabled feature to drop requests after having been skipped too many times
	* fixed range request bug for files larger than 2 GB in web seeds
	* don't crash when trying to create torrents with 0 files
	* fixed big_number __init__ in python bindings

release 0.14.8

	* ignore unkown metadata messages
	* fixed typo that would sometimes prevent queued torrents to be checked
	* fixed bug in auto-manager where active_downloads and active_seeds would
	  sometimes be used incorrectly
	* force_recheck() no longer crashes on torrents with no metadata
	* fixed broadcast socket regression from 0.14.7
	* fixed hang in NATPMP when shut down while waiting for a response
	* fixed some more error handling in bdecode

release 0.14.7

	* fixed deadlock in natpmp
	* resume data alerts are always posted, regardless of alert mask
	* added wait_for_alert to python binding
	* improved invalid filename character replacement
	* improved forward compatibility in DHT
	* added set_piece_hashes that takes a callback to the python binding
	* fixed division by zero in get_peer_info()
	* fixed bug where pieces may have been requested before the metadata
	  was received
	* fixed incorrect error when deleting files from a torrent where
	  not all files have been created
	* announces torrents immediately to the DHT when it's started
	* fixed bug in add_files that would fail to recurse if the path
	  ended with a /
	* fixed bug in error handling when parsing torrent files
	* fixed file checking bug when renaming a file before checking the torrent
	* fixed race conditon when receiving metadata from swarm
	* fixed assert in ut_metadata plugin
	* back-ported some fixes for building with no exceptions
	* fixed create_torrent when passing in a path ending with /
	* fixed move_storage when source doesn't exist
	* fixed DHT state save bug for node-id
	* fixed typo in python binding session_status struct
	* broadcast sockets now join every network interface (used for UPnP and
	  local peer discovery)

release 0.14.6

	* various missing include fixes to be buildable with boost 1.40
	* added missing functions to python binding related to torrent creation
	* fixed to add filename on web seed urls that lack it
	* fixed BOOST_ASIO_HASH_MAP_BUCKETS define for boost 1.39
	* fixed checking of fast and suggest messages when used with magnet links
	* fixed bug where web seeds would not disconnect if being resolved when
	  the torrent was paused
	* fixed download piece performance bug in piece picker
	* fixed bug in connect candidate counter
	* replaces invalid filename characters with .
	* added --with-libgeoip option to configure script to allow building and
	  linking against system wide library
	* fixed potential pure virtual function call in extensions on shutdown
	* fixed disk buffer leak in smart_ban extension

release 0.14.5

	* fixed bug when handling malformed webseed urls and an http proxy
	* fixed bug when setting unlimited upload or download rates for torrents
	* fix to make torrent_status::list_peers more accurate.
	* fixed memory leak in disk io thread when not using the cache
	* fixed bug in connect candidate counter
	* allow 0 upload slots
	* fixed bug in rename_file(). The new name would not always be saved in
	  the resume data
	* fixed resume data compatibility with 0.13
	* fixed rare piece-picker bug
	* fixed bug where one allowed-fast message would be sent even when
	  disabled
	* fixed race condition in UPnP which could lead to crash
	* fixed inversed seed_time ratio logic
	* added get_ip_filter() to session

release 0.14.4

	* connect candidate calculation fix
	* tightened up disk cache memory usage
	* fixed magnet link parser to accept hex-encoded info-hashes
	* fixed inverted logic when picking which peers to connect to
	  (should mean a slight performance improvement)
	* fixed a bug where a failed rename_file() would leave the storage
	  in an error state which would pause the torrent
	* fixed case when move_storage() would fail. Added a new alert
	  to be posted when it does
	* fixed crash bug when shutting down while checking a torrent
	* fixed handling of web seed urls that didn't end with a
	  slash for multi-file torrents
	* lowered the default connection speed to 10 connection attempts
	  per second
	* optimized memory usage when checking files fails
	* fixed bug when checking a torrent twice
	* improved handling of out-of-memory conditions in disk I/O thread
	* fixed bug when force-checking a torrent with partial pieces
	* fixed memory leak in disk cache
	* fixed torrent file path vulnerability
	* fixed upnp
	* fixed bug when dealing with clients that drop requests (i.e. BitComet)
	  fixes assert as well

release 0.14.3

	* added python binding for create_torrent
	* fixed boost-1.38 build
	* fixed bug where web seeds would be connected before the files
	  were checked
	* fixed filename bug when using wide characters
	* fixed rare crash in peer banning code
	* fixed potential HTTP compatibility issue
	* fixed UPnP crash
	* fixed UPnP issue where the control url contained the base url
	* fixed a replace_trackers bug
	* fixed bug where the DHT port mapping would not be removed when
	  changing DHT port
	* fixed move_storage bug when files were renamed to be moved out
	  of the root directory
	* added error handling for set_piece_hashes
	* fixed missing include in enum_if.cpp
	* fixed dual IP stack issue
	* fixed issue where renamed files were sometimes not saved in resume data
	* accepts tracker responses with no 'peers' field, as long as 'peers6'
	  is present
	* fixed CIDR-distance calculation in the precense of IPv6 peers
	* save partial resume data for torrents that are queued for checking
	  or checking, to maintain stats and renamed files
	* Don't try IPv6 on windows if it's not installed
	* move_storage fix
	* fixed potential crash on shutdown
	* fixed leaking exception from bdecode on malformed input
	* fixed bug where connection would hang when receiving a keepalive
	* fixed bug where an asio exception could be thrown when resolving
	  peer countries
	* fixed crash when shutting down while checking a torrent
	* fixed potential crash in connection_queue when a peer_connection
	  fail to open its socket

release 0.14.2

	* added missing functions to the python bindings torrent_info::map_file,
	  torrent_info::map_block and torrent_info::file_at_offset.
	* removed support for boost-1.33 and earlier (probably didn't work)
	* fixed potential freezes issues at shutdown
	* improved error message for python setup script
	* fixed bug when torrent file included announce-list, but no valid
	  tracker urls
	* fixed bug where the files requested from web seeds would be the
	  renamed file names instead of the original file names in the torrent.
	* documentation fix of queing section
	* fixed potential issue in udp_socket (affected udp tracker support)
	* made name, comment and created by also be subject to utf-8 error
	  correction (filenames already were)
	* fixed dead-lock when settings DHT proxy
	* added missing export directives to lazy_entry
	* fixed disk cache expiry settings bug (if changed, it would be set
	  to the cache size)
	* fixed bug in http_connection when binding to a particular IP
	* fixed typo in python binding (torrent_handle::piece_prioritize should
	  be torrent_handle::piece_priorities)
	* fixed race condition when saving DHT state
	* fixed bugs related to lexical_cast being locale dependent
	* added support for SunPro C++ compiler
	* fixed bug where messeges sometimes could be encrypted in the
	  wrong order, for encrypted connections.
	* fixed race condition where torrents could get stuck waiting to
	  get checked
	* fixed mapped files bug where it wouldn't be properly restored
	  from resume data properly
	* removed locale dependency in xml parser (caused asserts on windows)
	* fixed bug when talking to https 1.0 servers
	* fixed UPnP bug that could cause stack overflow

release 0.14.1

	* added converter for python unicode strings to utf-8 paths
	* fixed bug in http downloader where the host field did not
	  include the port number
	* fixed headers to not depend on NDEBUG, which would prohibit
	  linking a release build of libtorrent against a debug application
	* fixed bug in disk I/O thread that would make the thread
	  sometimes quit when an error occurred
	* fixed DHT bug
	* fixed potential shutdown crash in disk_io_thread
	* fixed usage of deprecated boost.filsystem functions
	* fixed http_connection unit test
	* fixed bug in DHT when a DHT state was loaded
	* made rate limiter change in 0.14 optional (to take estimated
	  TCP/IP overhead into account)
	* made the python plugin buildable through the makefile
	* fixed UPnP bug when url base ended with a slash and
	  path started with a slash
	* fixed various potentially leaking exceptions
	* fixed problem with removing torrents that are checking
	* fixed documentation bug regarding save_resume_data()
	* added missing documentation on torrent creation
	* fixed bugs in python client examples
	* fixed missing dependency in package-config file
	* fixed shared geoip linking in Jamfile
	* fixed python bindings build on windows and made it possible
	  to generate a windows installer
	* fixed bug in NAT-PMP implementation

release 0.14

	* deprecated add_torrent() in favor of a new add_torrent()
	  that takes a struct with parameters instead. Torrents
	  are paused and auto managed by default.
	* removed 'connecting_to_tracker' torrent state. This changes
	  the enum values for the other states.
	* Improved seeding and choking behavior.
	* Fixed rare buffer overrun bug when calling get_download_queue
	* Fixed rare bug where torrent could be put back into downloading
	  state even though it was finished, after checking files.
	* Fixed rename_file to work before the file on disk has been
	  created.
	* Fixed bug in tracker connections in case of errors caused
	  in the connection constructor.
	* Updated alert system to be filtered by category instead of
	  severity level. Alerts can generate a message through
	  alert::message().
	* Session constructor will now start dht, upnp, natpmp, lsd by
	  default. Flags can be passed in to the constructor to not
	  do this, if these features are to be enabled and disabled
	  at a later point.
	* Removed 'connecting_to_tracker' torrent state
	* Fix bug where FAST pieces were cancelled on choke
	* Fixed problems with restoring piece states when hash failed.
	* Minimum peer reconnect time fix. Peers with no failures would
	  reconnect immediately.
	* Improved web seed error handling
	* DHT announce fixes and off-by-one loop fix
	* Fixed UPnP xml parse bug where it would ignore the port number
	  for the control url.
	* Fixed bug in torrent writer where the private flag was added
	  outside of the info dictionary
	* Made the torrent file parser less strict of what goes in the
	  announce-list entry
	* Fixed type overflow bug where some statistics was incorrectly
	  reported for file larger than 2 GB
	* boost-1.35 support
	* Fixed bug in statistics from web server peers where it sometimes
	  could report too many bytes downloaded.
	* Fixed bug where statistics from the last second was lost when
	  disconnecting a peer.
	* receive buffer optimizations (memcpy savings and memory savings)
	* Support for specifying the TOS byte for peer traffic.
	* Basic support for queueing of torrents.
	* Better bias to give connections to downloading torrents
	  with fewer peers.
	* Optimized resource usage (removed the checking thread)
	* Support to bind outgoing connections to specific ports
	* Disk cache support.
	* New, more memory efficient, piece picker with sequential download
	  support (instead of the more complicated sequential download threshold).
	* Auto Upload slots. Automtically opens up more slots if
	  upload limit is not met.
	* Improved NAT-PMP support by querying the default gateway
	* Improved UPnP support by ignoring routers not on the clients subnet.

release 0.13
	
	* Added scrape support
	* Added add_extension() to torrent_handle. Can instantiate
	  extensions for torrents while downloading
	* Added support for remove_torrent to delete the files as well
	* Fixed issue with failing async_accept on windows
	* DHT improvements, proper error messages are now returned when
	  nodes sends bad packets
	* Optimized the country table used to resolve country of peers
	* Copying optimization for sending data. Data is no longer copied from
	  the disk I/O buffer to the send buffer.
	* Buffer optimization to use a raw buffer instead of std::vector<char>
	* Improved file storage to use sparse files
	* Updated python bindings
	* Added more clients to the identifiable clients list.
	* Torrents can now be started in paused state (to better support queuing)
	* Improved IPv6 support (support for IPv6 extension to trackers and
	  listens on both IPv6 and IPv4 interfaces).
	* Improved asserts used. Generates a stacktrace on linux
	* Piece picker optimizations and improvements
	* Improved unchoker, connection limit and rate limiter
	* Support for FAST extension
	* Fixed invalid calculation in DHT node distance
	* Fixed bug in URL parser that failed to parse IPv6 addresses
	* added peer download rate approximation
	* added port filter for outgoing connection (to prevent
	  triggering firewalls)
	* made most parameters configurable via session_settings
	* added encryption support
	* added parole mode for peers whose data fails the hash check.
	* optimized heap usage in piece-picker and web seed downloader.
	* fixed bug in DHT where older write tokens weren't accepted.
	* added support for sparse files.
	* introduced speed categories for peers and pieces, to separate
	  slow and fast peers.
	* added a half-open tcp connection limit that takes all connections
	  in to account, not just peer connections.
	* added alerts for filtered IPs.
	* added support for SOCKS4 and 5 proxies and HTTP CONNECT proxies.
	* fixed proper distributed copies calculation.
	* added option to use openssl for sha-1 calculations.
	* optimized the piece picker in the case where a peer is a seed.
	* added support for local peer discovery
	* removed the dependency on the compiled boost.date_time library
	* deprecated torrent_info::print()
	* added UPnP support
	* fixed problem where peer interested flags were not updated correctly
	  when pieces were filtered
	* improvements to ut_pex messages, including support for seed flag
	* prioritizes upload bandwidth to peers that might send back data
	* the following functions have been deprecated:
	  	void torrent_handle::filter_piece(int index, bool filter) const;
	  	void torrent_handle::filter_pieces(std::vector<bool> const& pieces) const;
	  	bool torrent_handle::is_piece_filtered(int index) const;
	  	std::vector<bool> torrent_handle::filtered_pieces() const;
	  	void torrent_handle::filter_files(std::vector<bool> const& files) const;
	  
	  instead, use the piece_priority functions.
	  
	* added support for NAT-PMP
	* added support for piece priorities. Piece filtering is now set as
	  a priority
	* Fixed crash when last piece was smaller than one block and reading
	  fastresume data for that piece
	* Makefiles should do a better job detecting boost
	* Fixed crash when all tracker urls are removed
	* Log files can now be created at user supplied path
	* Log files failing to create is no longer fatal
	* Fixed dead-lock in torrent_handle
	* Made it build with boost 1.34 on windows
	* Fixed bug in URL parser that failed to parse IPv6 addresses
	* Fixed bug in DHT, related to IPv6 nodes
	* DHT accepts transaction IDs that have garbage appended to them
	* DHT logs messages that it fails to decode

release 0.12

	* fixes to make the DHT more compatible
	* http seed improvements including error reporting and url encoding issues.
	* fixed bug where directories would be left behind when moving storage
	  in some cases.
	* fixed crashing bug when restarting or stopping the DHT.
	* added python binding, using boost.python
	* improved character conversion on windows when strings are not utf-8.
	* metadata extension now respects the private flag in the torrent.
	* made the DHT to only be used as a fallback to trackers by default.
	* added support for HTTP redirection support for web seeds.
	* fixed race condition when accessing a torrent that was checking its
	  fast resume data.
	* fixed a bug in the DHT which could be triggered if the network was
	  dropped or extremely rare cases.
	* if the download rate is limited, web seeds will now only use left-over
	  bandwidth after all bt peers have used up as much bandwidth as they can.
	* added the possibility to have libtorrent resolve the countries of
	  the peers in torrents.
	* improved the bandwidth limiter (it now implements a leaky bucket/node bucket).
	* improved the HTTP seed downloader to report accurate progress.
	* added more client peer-id signatures to be recognized.
	* added support for HTTP servers that skip the CR before the NL at line breaks.
	* fixed bug in the HTTP code that only accepted headers case sensitive.
	* fixed bug where one of the session constructors didn't initialize boost.filesystem. 
	* fixed bug when the initial checking of a torrent fails with an exception.
	* fixed bug in DHT code which would send incorrect announce messages.
	* fixed bug where the http header parser was case sensitive to the header
	  names.
	* Implemented an optmization which frees the piece_picker once a torrent
	  turns into a seed.
	* Added support for uT peer exchange extension, implemented by Massaroddel.
	* Modified the quota management to offer better bandwidth balancing
	  between peers.
	* logging now supports multiple sessions (different sessions now log
	  to different directories).
	* fixed random number generator seed problem, generating the same
	  peer-id for sessions constructed the same second.
	* added an option to accept multiple connections from the same IP.
	* improved tracker logging.
	* moved the file_pool into session. The number of open files is now
	  limited per session.
	* fixed uninitialized private flag in torrent_info
	* fixed long standing issue with file.cpp on windows. Replaced the low level
	  io functions used on windows.
	* made it possible to associate a name with torrents without metadata.
	* improved http-downloading performance by requesting entire pieces via
	  http.
	* added plugin interface for extensions. And changed the interface for
	  enabling extensions.

release 0.11

	* added support for incorrectly encoded paths in torrent files
	  (assumes Latin-1 encoding and converts to UTF-8).
	* added support for destructing session objects asynchronously.
	* fixed bug with file_progress() with files = 0 bytes
	* fixed a race condition bug in udp_tracker_connection that could
	  cause a crash.
	* fixed bug occuring when increasing the sequenced download threshold
	  with max availability lower than previous threshold.
	* fixed an integer overflow bug occuring when built with gcc 4.1.x
	* fixed crasing bug when closing while checking a torrent
	* fixed bug causing a crash with a torrent with piece length 0
	* added an extension to the DHT network protocol to support the
	  exchange of nodes with IPv6 addresses.
	* modified the ip_filter api slightly to support IPv6
	* modified the api slightly to make sequenced download threshold
	  a per torrent-setting.
	* changed the address type to support IPv6
	* fixed bug in piece picker which would not behave as
	  expected with regard to sequenced download threshold.
	* fixed bug with file_progress() with files > 2 GB.
	* added --enable-examples option to configure script.
	* fixed problem with the resource distribution algorithm
	  (controlling e.g upload/download rates).
	* fixed incorrect asserts in storage related to torrents with
	  zero-sized files.
	* added support for trackerless torrents (with kademlia DHT).
	* support for torrents with the private flag set.
	* support for torrents containing bootstrap nodes for the
	  DHT network.
	* fixed problem with the configure script on FreeBSD.
	* limits the pipelining used on url-seeds.
	* fixed problem where the shutdown always would delay for
	  session_settings::stop_tracker_timeout seconds.
	* session::listen_on() won't reopen the socket in case the port and
	  interface is the same as the one currently in use.
	* added http proxy support for web seeds.
	* fixed problem where upload and download stats could become incorrect
	  in case of high cpu load.
	* added more clients to the identifiable list.
	* fixed fingerprint parser to cope with latest Mainline versions.

release 0.10

	* fixed a bug where the requested number of peers in a tracker request could
	  be too big.
	* fixed a bug where empty files were not created in full allocation mode.
	* fixed a bug in storage that would, in rare cases, fail to do a
	  complete check.
	* exposed more settings for tweaking parameters in the piece-picker,
	  downloader and uploader (http_settings replaced by session_settings).
	* tweaked default settings to improve high bandwidth transfers.
	* improved the piece picker performance and made it possible to download
	  popular pieces in sequence to improve disk performance.
	* added the possibility to control upload and download limits per peer.
	* fixed problem with re-requesting skipped pieces when peer was sending pieces
	  out of fifo-order.
	* added support for http seeding (the GetRight protocol)
	* renamed identifiers called 'id' in the public interface to support linking
	  with Objective.C++
	* changed the extensions protocol to use the new one, which is also
	  implemented by uTorrent.
	* factorized the peer_connection and added web_peer_connection which is
	  able to download from http-sources.
	* converted the network code to use asio (resulted in slight api changes
	  dealing with network addresses).
	* made libtorrent build in vc7 (patches from Allen Zhao)
	* fixed bug caused when binding outgoing connections to a non-local interface.
	* add_torrent() will now throw if called while the session object is
	  being closed.
	* added the ability to limit the number of simultaneous half-open
	  TCP connections. Flags in peer_info has been added.

release 0.9.1

	* made the session disable file name checks within the boost.filsystem library
	* fixed race condition in the sockets
	* strings that are invalid utf-8 strings are now decoded with the
	  local codepage on windows
	* added the ability to build libtorrent both as a shared library
	* client_test can now monitor a directory for torrent files and automatically
	  start and stop downloads while running
	* fixed problem with file_size() when building on windows with unicode support
	* added a new torrent state, allocating
	* added a new alert, metadata_failed_alert
	* changed the interface to session::add_torrent for some speed optimizations.
	* greatly improved the command line control of the example client_test.
	* fixed bug where upload rate limit was not being applied.
	* files that are being checked will no longer stall files that don't need
	  checking.
	* changed the way libtorrent identifies support for its excentions
	  to look for 'ext' at the end of the peer-id.
	* improved performance by adding a circle buffer for the send buffer.
	* fixed bugs in the http tracker connection when using an http proxy.
	* fixed problem with storage's file pool when creating torrents and then
	  starting to seed them.
	* hard limit on remote request queue and timeout on requests (a timeout
	  triggers rerequests). This makes libtorrent work much better with
	  "broken" clients like BitComet which may ignore requests.

Initial release 0.9

	* multitracker support
	* serves multiple torrents on a single port and a single thread
	* supports http proxies and proxy authentication
	* gzipped tracker-responses
	* block level piece picker
	* queues torrents for file check, instead of checking all of them in parallel
	* uses separate threads for checking files and for main downloader
	* upload and download rate limits
	* piece-wise, unordered, incremental file allocation
	* fast resume support
	* supports files > 2 gigabytes
	* supports the no_peer_id=1 extension
	* support for udp-tracker protocol
	* number of connections limit
	* delays sending have messages
	* can resume pieces downloaded in any order
	* adjusts the length of the request queue depending on download rate
	* supports compact=1
	* selective downloading
	* ip filter