[tex-live] luatex bug reporting in tl16

[Karl Berry]

Addendum 1: as J-F pointed out to me privately, due to much work by the
LaTeX developers, straightforward LaTeX documents have a decent chance
of working without change.  (At least once some of the
non-LaTeX-core-but-still-pervasive packages are fixed.)  I still surmise
that pretty much anything that actually uses luatex-specific features
will need changes.

Addendum 2: I should have said that if all you know is that something is
broken and you really don't know where to direct the report, well, that
is what the general help forums are for, such as
http://lists.tug.org/texhax (mailing list),
http://latex-community.org/forum/ (forum),
http://tex.stackexchange.com/ (q&a).

karl