[Dev-luatex] We no long use Tangle, but the code still contains lot of identifiers with underscores stripped

[minux]

Hi!

LuaTeX stopped using tangle long time ago, but identifiers like
kpseinitprog, kpsesetprogramenabled, are still in the code.
They make the program a little unreadable, so I'm current working on
it. I would like to hear any suggestions from you: is
it necessary?

Best regards,
  minux.