Allow older teleport ConnectorProtocolVersion of "SIMULATION/0.1" to be manually forced in a new [SimulationService] config setting.

This is for testing and debugging purposes to help determine whether a particular issue may be teleport related or not
"SIMULATION/0.2" (the newer teleport protocol) remains the default.  If the source simulator only implements "SIMULATION/0.1" this will correctly allow fallback to the older protocol.
Specifying "SIMULATION/0.1" will force the older, less efficient protocol to always be used.
Merge branch 'master' of ssh://opensimulator.org/var/git/opensim