simplify proxytable path segment rewrite logic

lib/node-http-proxy/proxy-table.js

@@ -138,14 +138,12 @@ ProxyTable.prototype.getProxyLocation = function (req) {
       var route = this.routes[i];
       if (target.match(route.route)) {
         
-        var segments = route.path.split('/');
+        var pathSegments = route.path.split('/');
         
-        if (segments.length > 0) {
-          var lastSegment = new RegExp("/" + segments[segments.length - 1] + "$");
-          
-          if(req.url.match(lastSegment)) {
-            req.url = req.url.replace(lastSegment, '/');
-          }          
+        if (pathSegments.length > 0) {
+          // don't include the proxytable path segments in the proxied request url
+          pathSegments = new RegExp("/" + pathSegments.slice(1).join('/'));
+          req.url = req.url.replace(pathSegments, '');
         }
         
         var location = route.target.split(':'),