* rewrite Decay system
removed setting to switch to multithread decay
Syshook:: call_long treats true/false as 1/0
can_decay hook if it returns 2 skip multicheck
* sleeptime is used outside of PolLock, guarded via atomic
* updated docs
* renamed syshook private methods
added corechanges
Authors are not forced to use the clang-format setting, but should
atleast be inspired by the style.
The only thing which is now not allowed are tabs for ident/alignment!