doc: Removed auth-protocol.txt. A more up to date version is in wiki docs.
doc: Removed auth-protocol.txt. A more up to date version is in wiki docs.

jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,jkerihuel/dovecot,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch,jkerihuel/dovecot,jwm/dovecot-notmuch,jwm/dovecot-notmuch