Cgroups, major bugfixes, performance improvements, code cleanup. - Cgroups (v2) are implemented. Cgroups v1 are in progress. - Several bugfixes related to process names, to ananicy-cpp stopping and a few others are fixed - Some useless code has been removed, leading to some small performance improvements - Code is also cleaner, some leftover code (which could have led to nasty bugs in the future) was removed.