Proposed new text for request optional response

Replace:

This SOAP 1.1 request optional response HTTP binding can be used for
sending request messages with an optional response. For such messages,
the HTTP [RFC 2616]
<http://lists.w3.org/Archives/Public/public-ws-addressing/2006Jan/att-0072/soap11reqoptresphttpbinding.html#RFC2616>
response MUST be a 202 status code and the response body MAY be empty.

With

In addition to the options provided by [SOAP 1.1], the HTTP [RFC 2616]
<http://lists.w3.org/Archives/Public/public-ws-addressing/2006Jan/att-0072/soap11reqoptresphttpbinding.html#RFC2616>
response MAY also have a 202 status code.  If so, the response body MAY
be empty.