patched link module to allow more tld

https://www.drupal.org/node/2299657#comment-11414075
http://studio.g-u-i.net/en/materio/node/1524#comment-2488

sites/all/modules/contrib/fields/link/link.install

@@ -115,3 +115,17 @@ function link_update_7001() {
     }
   }
 }
+
+/**
+ * Removes unused link_extra_domains variable.
+ */
+function link_update_7002() {
+  variable_del('link_extra_domains');
+}
+
+/**
+ * Implements hook_uninstall().
+ */
+function link_uninstall() {
+  variable_del('link_allowed_domains');
+}