Small optimization: Don't try to pread() log file if we already know we've read everything.
Small optimization: Don't try to pread() log file if we already know we've
read everything.

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