pretest-build-svn50430: LuaTeX: several catches for indirect references to non existing objects.

git-svn-id: svn://tug.org/texlive/trunk/Build/source@50430 c570f23f-e606-0410-a88d-b1316a301751

pretest-build-svn50419: webquiz

git-svn-id: svn://tug.org/texlive/trunk/Build/source@50419 c570f23f-e606-0410-a88d-b1316a301751

pretest-build-20190312: reautoconf for mflua -> lua53 dependency

git-svn-id: svn://tug.org/texlive/trunk/Build/source@50342 c570f23f-e606-0410-a88d-b1316a301751

pretest-build-20190307: lwarp (6mar19)

git-svn-id: svn://tug.org/texlive/trunk/Build/source@50266 c570f23f-e606-0410-a88d-b1316a301751

pretest-build-20190228: afm2tfm, ttfdump: forbid too long file name

git-svn-id: svn://tug.org/texlive/trunk/Build/source@50140 c570f23f-e606-0410-a88d-b1316a301751

texlive-2018.2: use Nick in Changelog

git-svn-id: svn://tug.org/texlive/branches/branch2018/Build/source@48691 c570f23f-e606-0410-a88d-b1316a301751