Add support for SSL module

Adds support to handle the following SSL operations from the cPanel API:

Fetch SSL Certificate Information (fetchsslinfo) — This function displays an SSL certificate, CA bundle, and private key for a specified domain, or it can display a CA bundle and private key for a specified SSL certificate.

Generate an SSL Certificate (generatessl) — This function generates an SSL certificate.

Install an SSL Certificate (installssl) — This function lets you install an SSL certificate onto the server.

List Available SSL Certificates (listcrts) — This function lists all domains on the server which have SSL certificates installed.