Our internal fork of QP talks to the postfix cleanup service on a remote host, falling back to the local postfix cleanup socket. Continuig my quest to reduce the diff between our fork and abh/master, this adds support for a 'cleanup_sockets' config directive containing a list of socket paths and remote addresses to try to talk to postfix on. The result of these patches has worked great in the bit of internal testing that I did with our own systems and uses.
-Jared
