auth: Fixed loading authdb_imap plugin when Dovecot is configured --without-shared-libs
auth: Fixed loading authdb_imap plugin when Dovecot is configured --without-shared-libs

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