Merge branch 'jc/reflog-reverse-walk' into nd/branch-show-rebase-bisect-state

* jc/reflog-reverse-walk:
reflog: add for_each_reflog_ent_reverse() API
for_each_recent_reflog_ent(): simplify opening of a reflog file
for_each_reflog_ent(): extract a helper to process a single entry

diff --cc refs.c
Simple merge