example: patternize: Revise help message.
example: patternize: Refactor: Replace print => io.[stderr:]write
example: patternize: Refactor: Concentrate pattern loading code.
example: patternize: If a pattern file cannot be found, search for an alternative.

If pattern file '<file>' cannot be found by kpse, try to find a file
'hyph-<file>.pat.txt'.  That way, pattern file 'hyph-de-1901.pat.txt' can be
loaded like this

  texlua patternize.lua -p de-1901