HTTPS support is needed for Site Monitor plugin for ability to check the state of secure URLs like https://somesite

Current version (0.2) finishes with the following error:

javax.net.ssl.SSLHandshakeException: sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target - sun.security.validator.ValidatorException: PKIX path building failed: sun.security.provider.certpath.SunCertPathBuilderException: unable to find valid certification path to requested target
URL: https://somesite, response code: null, status: EXCEPTION