patch test and review

[Gaius Mulley]

Hello,

here are the proposed patches for mainline integration into gcc-13.
Feel free to test and comment/suggest improvements,

  https://splendidisolation.ddns.net/public/modula2/patchsummary.html

I plan on emailing patches 1-17 (to gcc patches) in the next couple of
days before they become stale (unless there are failures - or errors in
the patches)

regards,
Gaius