i004: Text for reorganization of security sections

Attached is some proposed text for the security sections in the Core
and SOAP binding specs.

I have taken into consideration the following inputs:
- Web Services Addressing 1.0 - SOAP Binding's section 4. Security
  Considerations:
  http://www.w3.org/TR/2005/WD-ws-addr-soap-20050215/#_Toc77464334
- Gudge's proposal:
  http://lists.w3.org/Archives/Public/public-ws-addressing/2005Feb/0130.html
- Paco's proposed amendment to Gudge's text:
  http://lists.w3.org/Archives/Public/public-ws-addressing/2005Feb/0175.html

Below is the detail of what I have done:
- started with Gudge's text
- split abstract (expressed with in terms of properties) vs. SOAP
  headers stuff into different specs
- incorporated useful stuff from the spec minus motherhood and apple
  pie text which I thought didn't bring much to the table.
- included users of WS-Addressing in the same bag as users of EPRs
- removed redundant text

Cheers,

Hugo

-- 
Hugo Haas - W3C
mailto:hugo@w3.org - http://www.w3.org/People/Hugo/