Merge pull request vpulim#600 from mgorczyca/http-persistent

In http.js, do not end request for keep-alive connections

lib/http.js

@@ -41,6 +41,10 @@ var httpRequest = function httpRequest(rurl, data, callback, exheaders, exoption
     headers: headers,
     followAllRedirects: true
   };
+
+  if (headers.Connection === 'keep-alive') {
+    options.body = data;
+  }
 
   exoptions = exoptions || {};
   for (attr in exoptions) { options[attr] = exoptions[attr]; }
@@ -61,8 +65,11 @@ var httpRequest = function httpRequest(rurl, data, callback, exheaders, exoption
       callback(null, res, body);
     }
   });
-  request.end(data);
-
+
+  if (headers.Connection !== 'keep-alive') {
+    request.end(data);
+  }
+
   return request;
 };