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