[fix] use agent pool

Author: yawnt

Diff for: lib/caronte.js

@@ -45,7 +45,7 @@ proxy.createProxyServer = function createProxyServer(options) {
     options[key] = url.parse(options[key]);
 
     options[key].maxSockets = options.maxSock;
-    options[key].agent = new (options.ssl ? https.Agent : http.Agent)(options[key]);
+    options[key].agent = new (options.ssl ? https.Agent : http.Agent)(options[key].maxSockets || 100);
   });
 
   return {

Diff for: lib/caronte/common.js

@@ -21,7 +21,7 @@ var common = exports;
  */
 
 common.setupOutgoing = function(outgoing, options, req, forward) {
-  ['host', 'hostname', 'port', 'socketPath'/*, 'agent'*/].forEach(
+  ['host', 'hostname', 'port', 'socketPath', 'agent'].forEach(
     function(e) { outgoing[e] = options[forward || 'target'][e]; }
   );