LUCENE-5897, LUCENE-5400: JFlex-based tokenizers StandardTokenizer and UAX29URLEmailTokenizer tokenize extremely slowly over long sequences of text partially matching certain grammar rules. The scanner default buffer size was reduced, and scanner buffer growth was disabled, resulting in much, much faster tokenization for these text sequences. (merged branch_4x r1619773)

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_10@1619836 13f79535-47bb-0310-9956-ffa450edef68
Merged revision(s) 1619832 from lucene/dev/trunk:
LUCENE-5898: Clean up build files version handling, fix bug with specification version

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_10@1619837 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5672: Fix addIndexes to call maybeMerge

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_10@1619838 13f79535-47bb-0310-9956-ffa450edef68
LUCENE-5672,LUCENE-5897,LUCENE-5400: move changes entry to 4.10.0

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/lucene_solr_4_10@1619842 13f79535-47bb-0310-9956-ffa450edef68