Change feedback URL.

Change-Id: Id4f392b9e646eed8b90357974523772ae1b2b72e

src/com/dmdirc/ui/core/feedback/FeedbackSender.java

      */
     private String sendData(final Map<String, String> postData) {
         try {
-            final List<String> response = downloader.getPage("http://www.dmdirc.com/feedback.php",
-                    postData);
+            final List<String> response = downloader.getPage(
+                    "http://feedback.dmdirc.com/dialog", postData);
             if (response.size() >= 1) {
                 return "Feedback sent successfully";
             } else {