[luatex] Unicode support

[Werner LEMBERG]

What is the status of LuaTeX's Unicode support?  According to the
documentation, the 'slnunicode' library is used.  However, this
project is no longer under development, see

  https://github.com/LuaDist/slnunicode

[This library comes with zero documentation, BTW, which is quite
unfortunate.]

In the above repository, the corresponding source code file that holds
the Unicode data, `slnudata.c`, is from 2006; this means it reflects
Unicode 5.0, while the current Unicode version is 15.0.

Do you use the `uniParse.tcl` script, probably

  https://opensource.apple.com/source/tcl/tcl-14/tcl/tools/uniParse.tcl.auto.html  ,

to regenerate `slnudata.c` as soon as a new Unicode version gets
published?  It would be nice if this information gets included in the
LuaTeX documentation...


    Werner