Same STARTTLS flush callback fix as with imap-login.
Same STARTTLS flush callback fix as with imap-login.

Distrotech/dovecot,Distrotech/dovecot,damoxc/dovecot,Distrotech/dovecot,Distrotech/dovecot,damoxc/dovecot,Distrotech/dovecot,damoxc/dovecot,damoxc/dovecot,damoxc/dovecot