Land rapid7#1970 - Support rhost/rport option overrides in HttpClient

Good for if you want to send HTTP requests to different ports and/or
hosts.

Author: wchen-r7

lib/msf/core/exploit/http/client.rb

@@ -149,8 +149,8 @@ def connect(opts={})
 		client_password = opts['password'] || datastore['PASSWORD'] || ''
 
 		nclient = Rex::Proto::Http::Client.new(
-			rhost,
-			rport.to_i,
+			opts['rhost'] || rhost,
+			(opts['rport'] || rport).to_i,
 			{
 				'Msf'        => framework,
 				'MsfExploit' => self,