doc: http response event options (agent.getName()?) #4586

Under the http.ClientRequest response event there's an Options section that doesn't make sense. It was originally introduced with an http.getAgent() method (a2328dc) that appears to be gone. It appears to me that these options now belong to http.Agent.getName(), though with a rename: socketPath => localAddress. I'm not sure what the documentation on that param means by:

(use one of host:port or socketPath)