Message 132210 - Python tracker

New patch 605422430234.diff:
 - Remove test_refcount(), it changed faulthandler internal state, and so it was no more possible to use faulthandler in regrtest.py
 - Use "#ifdef HAVE_ALARM" to decide if dump_traceback_later() is available, instead of "#ifdef SIGALRM"
 - Don't document _sig*() functions or _fatal_error() anymore