DeleteCommentsCommandForm: Allow iterable for setComments()

The command form loops over the comments to delete. It is not necessary
to expect an array here. The Icinga DB web module passes an iterable
here.

modules/monitoring/application/forms/Command/Object/DeleteCommentsCommandForm.php

@@ -30,11 +30,11 @@ class DeleteCommentsCommandForm extends CommandForm
     /**
      * Set the comments to delete
      *
-     * @param   array $comments
+     * @param   iterable $comments
      *
      * @return  $this
      */
-    public function setComments(array $comments)
+    public function setComments($comments)
     {
         $this->comments = $comments;
         return $this;