merged fix from RC_0_16

ChangeLog

@@ -25,6 +25,10 @@
 	* fix uTP edge case where udp socket buffer fills up
 	* fix nagle implementation in uTP
 
+	* pass along host header with http proxy requests and possible http_connection shutdown hang
+
+0.16.12 release
+
 	* fix building with C++11
 	* fix IPv6 support in UDP socket (uTP)
 	* fix mingw build issues

src/http_connection.cpp

@@ -171,6 +171,7 @@ void http_connection::get(std::string const& url, time_duration timeout, int pri
 		if (ps->type == proxy_settings::http_pw)
 			APPEND_FMT1("Proxy-Authorization: Basic %s\r\n", base64encode(
 				ps->username + ":" + ps->password).c_str());
+		APPEND_FMT1("Host: %s", hostname.c_str());
 		hostname = ps->hostname;
 		port = ps->port;
 	}
@@ -667,6 +668,8 @@ void http_connection::on_write(error_code const& e)
 		return;
 	}
 
+	if (m_abort) return;
+
 	std::string().swap(sendbuffer);
 	m_recvbuffer.resize(4096);
 
@@ -701,6 +704,7 @@ void http_connection::on_read(error_code const& e
 #if defined TORRENT_ASIO_DEBUGGING
 	complete_async("http_connection::on_read");
 #endif
+
 	if (m_rate_limit)
 	{
 		m_download_quota -= bytes_transferred;
@@ -709,6 +713,8 @@ void http_connection::on_read(error_code const& e
 
 	if (e == asio::error::operation_aborted) return;
 
+	if (m_abort) return;
+
 	// keep ourselves alive even if the callback function
 	// deletes this object
 	boost::shared_ptr<http_connection> me(shared_from_this());