inhibit: don't inhibit pinned commits during rebase
During a rebase we pin certain commits to always be visible. This caused the
inhibit extension to inhibit them when a transaction closed. Let's make inhibit
aware of such pins and not obsolete them.
syntax: re
/figures/[^/]+\.png$
^docs/build/
^docs/html/
^html/
\.pyc$
~$
\.swp$
\.orig$
\.rej$
\.err$
^tests/easy_run.sh$
^build/
^MANIFEST$
^docs/tutorials/.*\.rst$
\.ico$