actor and mustUnderstand added to envelope?

[Kent Tong]

Hi,
In SignedSOAPEnvelope.java in the security example, the actor and
mustUnderstand attributes are added to the envelope:
   env.addAttribute(Constants.URI_SOAP11_ENV, "actor", "some-uri");
   env.addAttribute(Constants.URI_SOAP11_ENV, "mustUnderstand", "1");
Shouldn't they be added to the head entry instead?