DOC: fix some spelling issues over multiple files

This is from the output of codespell and may be backported.

(cherry picked from commit cdbcca9995a4974c6998720e158d6f1d4d9a25c0)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit dab4ba60421f3a9ea984df3ccd79604bc7224ead)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 12bbe3a4d8331579170f3f067373f88b6eeb869f)
[wt: dropped non-existing parts]
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 59bf7fc483cb09f4a378009b1eb035ccfd8f07fa)
[wt: dropped non-existing parts]
Signed-off-by: Willy Tarreau <w@1wt.eu>
7 files changed