handlers to set flags only (with exception for sigquit(),
which still seems to call some non-reentrant functions on
its way to _exit(2).) That must eliminate the possibility
of catching SIGSEGV from following non-reentrant paths from
signal handlers.
PR: bin/32740 bin/33846
Submitted by: Maxim Konovalov <maxim@macomnet.ru>
Obtained from: OpenBSD