OAK-2167: Last revision recover incomplete

Fix usage of getCandidates()

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1630090 13f79535-47bb-0310-9956-ffa450edef68
documentation: add 'upgrade' mode to Table Of Contents

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1630093 13f79535-47bb-0310-9956-ffa450edef68
OAK-2147 [Ordered Index] Indexing on large content is slow

git-svn-id: https://svn.apache.org/repos/asf/jackrabbit/oak/trunk@1630101 13f79535-47bb-0310-9956-ffa450edef68