security/zeek: Fix intermittent crash
Also fix trace-summary python backtrace.
Intermittent crash:
https://github.com/zeek/zeek/commit/8c337bd7693a2002dcfe8a15b35dc92eb9e78de9 threading/MsgThread: Decouple IO source and thread A MsgThread acting as an IO source itself can result in the scenario where the threading manager's heartbeat timer deletes a terminated MsgThread instance, but at the same time this instance is in the list of ready IO sources as determined by the IO loop in the current iteration.
trace-summary backtrace:
https://github.com/zeek/pysubnettree/pull/38 Fix extension for stricter unicode validation This fixes our extension module for python/cpython#105375 which made unicode validation stricter.
Reported by: Arne Welzel (crash), ogogon (backtrace)