Fix typos reported by codespell in code comments

Also in old changelogs, but nothing really user visible
like error messages or alike so barely noteworthy.

Reported-By: codespell
Gbp-Dch: Ignore
2 jobs for master in 72 minutes and 41 seconds (queued for 5 seconds)
Status Job ID Name Coverage
  Test
passed #219619
test as root

01:09:33

71.0%
passed #219620
test as user

01:12:40

74.0%