No longer appends / to path if ignorePath is set

Author: Torthu

lib/http-proxy/common.js

@@ -88,7 +88,7 @@ common.setupOutgoing = function(outgoing, options, req, forward) {
   // path is. This can be labeled as FOOT-GUN material if you do not know what
   // you are doing and are using conflicting options.
   //
-  outgoingPath = !options.ignorePath ? outgoingPath : '/';
+  outgoingPath = !options.ignorePath ? outgoingPath : '';
 
   outgoing.path = common.urlJoin(targetPath, outgoingPath);