r11714: put in a workaround for a winbind problem volker asked me about. The

r11714: put in a workaround for a winbind problem volker asked me about. The
problem is that winbind currently relies on being able to receive on a
smb connection from within the same connections receive routine. This
means it relies on a non-serialised connection, so disable the
serialisation until winbind is fixed.

The correct fix will be to get rid of full_request() in dcerpc.c so
that bind requests can be fully async.
(This used to be commit c4115293d83a4a6d103e049c5832d4bcdc0a9dbc)