Persistent connections for pheanstalk


Completed integration of pfsockopen for persistent connections.   It should be noted that in this pass, support for multiple server:port combinations doesn't exist.   With non-persistent connections there is no problem but with persistent, you need to keep state about which ID you need to connect to, and switch around a bit.   That part hasn't been written (not my forte, for sure - but I hope to get it done).

In the meantime, a note should probably be made somewhere other than the todo I left in place. :)
Indentation is wrong.