Issue #1460690 by Gidgidonihah,barraponto,pedrofaria: Absolute URLS validation.

fapi_validation.module

@@ -161,7 +161,7 @@ function fapi_validation_fapi_validation_rules() {
     ),
     'email' => array(
       'callback' => 'fapi_validation_rule_email',
-      'error_msg' => t('The field %field not is a valid email.')
+      'error_msg' => t('%field not is a valid email.')
     ),
     'length' => array(
       'callback' => 'fapi_validation_rule_length',
@@ -248,8 +248,8 @@ function fapi_validation_rule_length($value, $params) {
   }
 }
 
-function fapi_validation_rule_url($value) {
-  return valid_url($value);
+function fapi_validation_rule_url($value, $params = array()) {
+  return valid_url($value, !empty($params) && $params[0] == 'absolute');
 }
 
 function fapi_validation_rule_ipv4($value) {