The asterisk in the abbreviation *NIX (for UNIX/Linux) needs to be
escaped to not mean start of italic formatting. This is consistent
with docs/RELEASE-PROCEDURE.md.
Closes: #8802
Reviewed-by: Daniel Stenberg <daniel@haxx.se>
We currently use both spellings the british "behaviour" and the american
"behavior". However "behavior" is more used in the project so I think
it's worth dropping the british name.
Closes#6395
