This is a merged port from /tg/station and Virgo on logging standards.
The diary has been replaced with GLOB.world_game_log, diaryofmeanpeople
is gone (because it wasn't actually used) and a whole bunch of logging
procs have been changed to optimize Splunk.
Currently, to_chat is literally just a proc that does user << message.
But it'll let us do output modification in the future, especially for
something like Goon's HTML chat.
Big thanks to PJB for his to_chat script, see
https://github.com/d3athrow/vgstation13/pull/6625 for more details.