SOLR-4221: back compat for router spec

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1526003 13f79535-47bb-0310-9956-ffa450edef68
SOLR-5257: new scripts for use with solr ref guide RCs and publishing

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1526083 13f79535-47bb-0310-9956-ffa450edef68