fixed very annoying '5 second timeout' bug in Host_ShutdownServer (the local client...

fixed very annoying '5 second timeout' bug in Host_ShutdownServer (the local client was timing out on the NetConn_SendToAll because the server was ignoring the client's reply packets, by setting sv.active = false too early)
added Host_ShutdownServer call near every CL_Disconnect call, for consistency
CL_Disconnect and Host_ShutdownServer now report their calls as dprints (previously they were entirely silent)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@4081 d7cf8633-e32d-0410-b094-e92efae38249