fix misspelling in warning output text

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1432936 13f79535-47bb-0310-9956-ffa450edef68
Modernize links

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/trunk@1432937 13f79535-47bb-0310-9956-ffa450edef68