Improve process control at startup

[Mike Rylander]

There are times when we want to be able to run multiple instances of OpenSRF on one server. There is also a need for routers to be able to write their own pid files. Lebbeous wrote some code to allow both.

Code to come soon, after rebasing and commit amendment.

[Mike Rylander (mrylander)]

You'll find the code here: http://git.evergreen-ils.org/?p=working/OpenSRF.git;a=shortlog;h=refs/heads/collab/miker/router-and-mulit_instance-improvement