Merge branch 'stable-2.9'

* stable-2.9:
  Fix GitWeb link for parent commits
  Move gerrit.war from api_{install,deploy} to war_{install,deploy}
  New review UI: Fix display of large avatar image in user popup panel

Conflicts:
	.buckconfig

Change-Id: I3ec139fb5b95fc443be834fba8866528e7a51ab2