DOC: assorted typo fixes in the documentation

This is the fourth round of cleanups in various docs

(cherry picked from commit 1fae8db7b7a9db2a7442674232f1382205947abb)
Signed-off-by: Willy Tarreau <w@1wt.eu>
(cherry picked from commit 173ea2dc51399e8edf3c97fc8daf520285cd5c33)
[wt: dropped initcall part]
Signed-off-by: Willy Tarreau <w@1wt.eu>
3 files changed