Give an error if there are duplicate files for a single module. Also if the module directory can't be opened, die immediately.
Give an error if there are duplicate files for a single module. Also if the
module directory can't be opened, die immediately.

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