JCR-4868: Release Jackrabbit 2.21.6 - candidate release notes
JCR-4868: Release Jackrabbit 2.21.6 - candidate release notes

git-svn-id: 02b679d096242155780e1604e997947d154ee04a@1888380 13f79535-47bb-0310-9956-ffa450edef68

apache/jackrabbit,apache/jackrabbit,apache/jackrabbit