Stallman on GCC, LLVM, and copyleft

i do report problems as i encounter them, but the response time could sometimes be better (see #61311 and #61313, not even confirmed after a week).

as for my compat header, see #61176. i think such a compat header doesn't belong into gcc per se. if anything, at most more attention could be paid when changing the exposed API, headers, etc so that plugins have less churn but i'm not really complaining here, it's been quite managable so far (perhaps my only real gripe is that #41757 was ignored at the time).