Cleanup a bit
Use configure options closer to TL build
compiler warnings: Drop 'set but not used' variables

git-svn-id: svn://tug.org/texlive/trunk/Build@30976 c570f23f-e606-0410-a88d-b1316a301751
Improve DVI id version comment
Plug various memory leaks

We were leaking massive amounts of memory when doing AAT layout, found
also some lesser leaks that are now fixed, too.
More cleaner font comparison