Merge branch 'mh/packed-ref-store-prep'

Bugfix for a topic that is (only) in 'master'.

* mh/packed-ref-store-prep:
for_each_bisect_ref(): don't trim refnames
lock_packed_refs(): fix cache validity check

diff --cc refs.c
Simple merge

diff --cc refs/files-backend.c
Simple merge

diff --cc revision.c
Simple merge