imapc: Fix to previous change - labels are strings and not atoms. Allow also atoms just in case
imapc: Fix to previous change - labels are strings and not atoms.
Allow also atoms just in case

LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot