Per the discussion in issue6882, backport the try/finally work that was done to the py3k version (mostly in r59477, I think).

Also, use the hasattr() like scheme of allowing BaseException exceptions through.

We probably need a function in test_support to handle this.

fixes the problem of some exceptions being thrown at shutdown when the
interpreter is killed. Patch by Adam Olsen.

finite non-subnormal values, even those with exponent > Emax.

GNU readline library version 6.0.

This fixes the test_ssl failure.

mode for more information if we are already running in verbose mode.

added not finding Lib/test in the path indicated something was wrong,
but when running regtest using "python -m" Lib/test isn't typically in
the path, so this message is now more disturbing than it is helpful.

last false positive when running regrtest with -j.