There are a lot of config files still referring to LUCENE_CURRENT. Separate issue from LUCENE-5900 to keep the changes there visible, without drowning them in an enormous diff.
Not as large as I thought, but here is a patch.
Commit 1620718 from Ryan Ernst in branch 'dev/trunk'
[ https://svn.apache.org/r1620718 ]
LUCENE-5901:Replaced all occurences of LUCENE_CURRENT with LATEST for luceneMatchVersion
Commit 1620734 from Ryan Ernst in branch 'dev/branches/branch_4x'
[ https://svn.apache.org/r1620734 ]
Bulk close after 5.0 release.