wwwoffle-checkcert - check wwwoffle root certificate
This utility checks whether the self-generated root certificate is
expired, or is about to expire. If the expiry will happen less than one
week from now, report this. If the certificate has already expired,
also report this and exit with return value 2.
/etc/wwwoffle/certificates/root/root-key.pem key file
/etc/wwwoffle/certificates/root/root-cert.pem certificate file
Written by Paul Slootman <email@example.com>