added qw compatible "rcon" support (allows a client who knows the server's rcon_passw...

added qw compatible "rcon" support (allows a client who knows the server's rcon_password to run a command on the server), had to move NetConn_ServerFrame outside of the SV_VM_Begin block in Host_ServerFrame, and add relevant SV_VM_Begin blocks to various parts of host_cmd.c
added qw print command packet to client packet processing (needed for remote rcon when not connected to the server)
added qw "packet" command (sends a text message to the specified address)

git-svn-id: svn://svn.icculus.org/twilight/trunk/darkplaces@6017 d7cf8633-e32d-0410-b094-e92efae38249