catacomb/__init__.py: Awful bodge for symbol conflict.
It seems that, in Debian jessie and later, the main Python binary now
exports `md5_init' and friends. Unfortunately, this overrides
Catacomb's existing `md5_init' with a rather different version, and the
result is a segfault (on i386) or wrong answers (on amd64).
So, as an unpleasant bodge (while this broken thing makes its way
through Debian, see bug #868366), try to force the `RTLD_DEEPBIND' flag
when loading the module. This is unfortunate, because Python doesn't
actually advertise this flag, at least in my version.
~mdw / catacomb-python / commit