The game crashes if armathentication is disabled

[Foster McLane]

The game uses threads outside of armathentication, but the threading class is only defined if armathentication is enabled. If it is off, the boost::thread class is defined simply to do an assertion fail at runtime. I attached a patch that fixes this by enabling threading all of the time instead of only when armathentication is enabled.

[Yann Kaiser (epsy)]

While I applied your patch, we have no plans to support --disable-authentication in 0.4, as the local users feature replaces the old "master password" approach with the same codebase and functionality as Global IDs.