Merge branch 'stable'
* stable:
Update 2.1.8 release notes
Allow serving static files in subdirectories
Normalize OpenID URLs with http:// prefix
Ignore PartialResultException from LDAP.
Fix MySQL counter resets
Substantially speed up pushing changes for review
Avoid costly findMergedInto during push to refs/for/*
Add cache for tag advertisements
Conflicts:
gerrit-server/src/main/java/com/google/gerrit/server/git/MergeOp.java
gerrit-server/src/main/java/com/google/gerrit/server/git/ReceiveCommits.java
pom.xml
Change-Id: Ife316e255a8045bd28ca399d55e70eb8a075c48f
