grant access to administer content access, per node

Rather than adding another permission, the simplest idea I can think of is to let anyone with 'delete' permission also have access to the tab that controls the ACL.

It seems like I just have to change this function, like so:

function content_access_node_page_access($node) {
  global $user;
  return content_access_get_settings('per_node', $node->type) && user_access('grant content access') ||
    content_access_get_settings('per_node', $node->type) && (user_access('grant own content access') && ($user->uid == $node->uid)) 
         || db_query("SELECT acl_node.grant_delete FROM acl_node,acl_user WHERE acl_node.nid = :nid AND acl_user.acl_id = acl_node.acl_id AND acl_user.uid = :uid", array(':nid' => $node->nid, ':uid' => $user->uid))->fetchField();
 ;
}

Maybe there's a nicer way to do it?

I guess I'll turn this into a feature request; given that there's now a prototype solution, maybe something less hacky will come to mind for one of ya'll.