Merge branch 'stable-2.10'
* stable-2.10:
Release notes for Gerrit 2.9.1
Set version to 2.9.1
Display parents for all changes, not only merge commits
Fix JS plugin load when using non-root Gerrit URLs
Don't require secondary index when running daemon in slave mode
Remove fixed limit of results returned by secondary index query
Conflicts:
gerrit-pgm/src/main/java/com/google/gerrit/pgm/Reindex.java
gerrit-server/src/main/java/com/google/gerrit/server/index/IndexRewriteImpl.java
Change-Id: I66a9909edc789ee826f5091ca87044e160a25926