Title: #5624: DEBUG: fix _all_levels_enabled()
Expression was wrong in case `debug_level` had any bit without associated level turned on
(for example, 0xfff0).
Thanks @pbrezina for the catch.
To pull the PR as Git branch:
git remote add ghsssd https://github.com/SSSD/sssd
git fetch ghsssd pull/5624/head:pr5624
git checkout pr5624