Easylogging thread unsafety crash and thread safety failed to call

[jonpas]

#define ELPP_THREAD_SAFE causes antenna loading issues on game start already, it just reports as <null>. However, when not using thread safe, there is a rare crash involved, obviously due to logging in different threads.

Seems to only happen on debug build with lots of logging from different places, which is not usual (experienced in testing with lots of logging in antenna processing and so on), so it should be fine in normal builds, but we should look at it sooner or later. Old defines with leading underscores have been gone since before we moved to GitHub, so obviously not an issue for normal release builds.

[jonpas]

Intercept switched to spdlog, works much better so far.