afl++ >= 4.09c breaks cmplog on secondary instances of afl-fuzz?

[fuzzah]

Testing have shown that current bugbane dev version can run afl++ 4.08c normally, but starting from 4.09c secondary afl-fuzz instances running cmplog seem to freeze on start.
Need to investigate this further and maybe do different actions based on AFL++ version.

Temporary workarounds:

1. use afl++ <= 4.08c
2. don't build cmplog (build tool: opt-out of laf & cmplog #30)