Handle https links.
Check SSL certificate expiration date.
Check SSL certificate expiration date. Only internal https: links
will be checked. A domain will only be checked once to avoid duplicate
The expiration warning time can be configured with the sslcertwarndays
Initialize clamav configuration.
Check validity, scheme, extern and url_connection.
Run all SSL certificate checks that have not yet been done.
OpenSSL already checked the SSL notBefore and notAfter dates.
Check if the certificate is still valid, or if configured check
if it’s at least a number of days valid.
Read configuration file options.