remove another Environment.TickCount mask
untwist Environment.TickCount in DataSnapshotManager.cs
get rid of some TickCount masking in LLUDPClient.cs
get rid of some TickCount masking in LLUDPClient.cs and LLUDPServer.cs
remove masking from EnvironmentTickCount() stuff

Basically the old code fails if true tick count difference is >= 0x40000000.
The new code fails if the true tick count difference is >= 0x80000000 and is
much simpler.

Example 1:

  unmasked prevtime = 0x00000000
  unmasked newtime  = 0x40000000

  old code EnvironmentTickCountSubtract = 0x00000000
  new code EnvironmentTickCountSubtract = 0x40000000

Example 2:

  unmasked prevtime = 0xF0000000
  unmasked newtime  = 0x30000000

  old code EnvironmentTickCountSubtract = 0x00000000
  new code EnvironmentTickCountSubtract = 0x40000000
get rid of suppress_console_output_() calls

...to see module load errors
make Dreamnation version message
seems group notices now use SynchronousRestObjectRequester

...so have it use our SynchronousHttpRequester
because mono's WebRequest hangs during heavy use
add GetOpenSimBase property for Restarter module
fix llRequestAgentData() caching

...so it doesn't pound on Robust server