internal package Foswiki::Configure::Checkers::CertificateChecker is a Foswiki::Configure::Checker This checker validates files that contain X.509 certificates, such as for the S/MIME signatures and for the Tasks framework.
It must be subclassed for the various certificate types, as the requirements are slightly different.
ObjectMethod checkUsage( $keys, $usage, $reporter ) → @subjects $keys item to check
$usage - Required use (email, client, server, clientserver)
Returns list of subjects.