Correct the description of the park() and unpark() method.

Previously they shared their description with the list parked domains method.

Author: harrybailey

xmlapi.php

@@ -2332,7 +2332,7 @@ public function addpop($username, $args)
         return $this->api1_query($username, 'Email', 'addpop', $args);
     }
 
-    // This API function displays a list of all parked domains for a specific user.
+    // This API function parks a domain onto this user's account
     public function park($username, $newdomain, $topdomain)
     {
         $args = array();
@@ -2349,7 +2349,7 @@ public function park($username, $newdomain, $topdomain)
         return $this->api2_query($username, 'Park', 'park', $args);
     }
 
-    // This API function displays a list of all parked domains for a specific user.
+    // This API function unparks a domain from this user's account.
     public function unpark($username, $domain)
     {
         $args = array();