IXR_Client overrides and sets incorrect HTTPS default port

[beaucollins]

IXR_Client will attempt to parse the correct parameters from the $server argument when $path is not provided.

In cases where the port is not provided within the url (e.g. "​https://example.com:443/") it will always default to port 80 no matter which scheme is used.

If no port is in the URL it should default to the correct port for the given scheme.

[dd32]

Realistically clients should be extending WP_HTTP_IXR_Client instead - it uses the HTTP API rather than direct fsockopen calls, and doesn't suffer from this problem.

[dd32]

Upon further inspection, it seems that IXR_Client doesn't even support SSL anyway.. I'm going to recommend we just leave it be, and leave those who run into problems with the simple answer of Use WP_HTTP_IXR_Client instead.