Parse all of the fields for runtime server

[AdamJCrawford]

The RuntimeServer struct only has a few of the fields that are returned. That struct should have the rest of the fields added.

[AdamJCrawford]

Before I start working on it, is there any concern with adding the rest to the existing struct?

[oktalz]

@AdamJCrawford no conerns,

maybe just potentially not all of them are supported in older versions of HAProxy but that just needs means do we backport this or not to older versions of project