* Add a session concurrency option per key.  Allows developer/config to specify number of concurrent requests on a service.
Configured to make Diff for Push to Opensim Project
Diffs only to PostgreSQL mods.
BulletSim: Fix snap back from edge of region problem. Mantis 6794.
Merge remote-tracking branch 'remotes/ffoliveira/PostgreSQL'
Merge branch 'master' of https://github.com/ffoliveira/opensimulator
changes for migration and rebase from nebadon