During the long-lived PR, multiple contributions to the existing Github Wiki were made, this commit applies those here and mentions the files and authors attributed to the changes:
JaapD: dkim.md + forward-only-mailserver-with-ldap-authentication.md
Added corrections to `setup.sh config dkim` command.
Added compatibility warning about 4096-bit key sizes or greater.
Added ldap tip.
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fred727-temp: optional-config.md
Added a mention for `user-patches.sh`.
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Semir Patel: setup.sh.md + debugging.md
Minor corrections. Additionally corrected `tvial` references that had already been updated in this PR series.
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Stefan Neben: kubernetes.md
> Port 25 proxy protocol configuration in master.cf was missing
docs(sync): Add Github Wiki contributions
> IMAP with STARTTLS is also active, so we need that option here as well
docs(sync): Add Github Wiki contribution
