[RPCRT4] Sync with Wine Staging 2.9. CORE-13362

6b53b79 rpcrt4: Use HEAP_ZERO_MEMORY to alloc RpcServerProtseq objects.
28f865b rpcrt4: Add close_read implementation for TCP connections.
29f0b28 rpcrt4: Add close_read implementation for named pipe connections.
42ba4d7 rpcrt4: Introduce op for closing connection read end and use it when shutting down server.
ef267f1 rpcrt4: Store all active connections in RpcServerProtseq.
dae3065 rpcrt4: Remove connection from list in RPCRT4_ReleaseConnection.
812897c rpcrt4: Use HEAP_ZERO_MEMORY to alloc RpcConnection objects.
13d529a rpcrt4: Renamed connections list to listeners.
c953763 rpcrt4: Remove no longer needed helpers.
b548338 rpcrt4: Implement cancel_call for named pipes.
372c9e0 rpcrt4: Cache event handle in RpcConnection_np object.
6e7a297 rpcrt4: Use non-blocking listening on named pipes.
4f4ac8c rpcrt4: Use named pipe in overlapped mode.
bd6f807 rpcrt4: Simplify rpcrt4_conn_np_read implementation.
f62b9d6 rpcrt4: Simplify rpcrt4_conn_np_write implementation.
2035294 rpcrt4: Use standard Wine list to store connections in RpcServerProtseq.
e621593 rpcrt4: Always use winsock for networking.
d0ed6d1 rpcrt4: Get rid of manual_listen_count and use binary state instead.

svn path=/trunk/; revision=74904