[ 559250 ] more POSIX signal stuff
Adds support (and docs and tests and autoconfery) for posix signal
mask handling -- sigpending, sigprocmask and sigsuspend.
and replaces them with a new API verify(). As a result the regression
suite will also perform its tests in optimization mode.
Written by Marc-Andre Lemburg. Copyright assigned to Guido van Rossum.
test_*: converted to the new test harness. GvR note! test_signal.py
works interatively (i.e. when verbose=1) but does not work inside the
test harness. It must be a timing issue, but I haven't figured it out
yet.