Reverted back the isdigit()/etc. They're defined to get int argument, so we shouldn't given them unsigned.
Reverted back the isdigit()/etc. They're defined to get int argument, so we
shouldn't given them unsigned.

Distrotech/dovecot,Distrotech/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,LTD-Beget/dovecot,damoxc/dovecot,damoxc/dovecot,damoxc/dovecot,LTD-Beget/dovecot,Distrotech/dovecot,Distrotech/dovecot,LTD-Beget/dovecot,Distrotech/dovecot,damoxc/dovecot,damoxc/dovecot