file descriptor.
Associate file descriptors with handles on the server side so that we
don't need to pass the fd every time the client wants to use it.
A few other optimizations in request processing in the server.
Moved automatically generated request definitions to server.h and
removed include/server/request.h.
- moved request handlers to the specific C files
- moved handle management to handle.c
- moved server private includes to server/ instead of include/server/
Alexandre Julliard