Merged revision(s) 1442507-1442508 from lucene/dev/trunk:
LUCENE-4570: Use the Policeman Forbidden API checker, released separately from Lucene and downloaded via Ivy
LUCENE-4570: typo


git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_4x@1442509 13f79535-47bb-0310-9956-ffa450edef68