clarify that IW.expungeDeletes relies on MP to determine merges

git-svn-id: https://svn.apache.org/repos/asf/lucene/dev/branches/branch_3x@1169817 13f79535-47bb-0310-9956-ffa450edef68
1 file changed
tree: 502d416fb6e3033a8d2a7509e84cc7f874fbbb95
  1. dev-tools/
  2. lucene/
  3. solr/
  4. .hgignore
  5. build.xml
  6. README.txt