Port fixes for:
* DEV-10609 Checkboxes in About Land untick when selected
* Extend the sim node regex to support sim1-telstra.durga.lindenlab.com for colo testing.
* Provide "version_valid" for each version when querying a channel
* Update to latest eventlet r87, to handle multi-character terminators split across read buffers
* DEV-10487 Log viewer stats sim and php fix
* QAR-288: Pull in crash fixes from LSL bytecode parsing
* DEV-10498 The agentN-ds host name was constructed incorrectly and caused services_base_url to be incorrect
* Fixed a potential crash bug caused by LSL library functions returning null pointers instead of empty strings.
Steven Bennetts