[security-services] URI extensions etc

One issue that was raised was the issue of expressing identifiers as URI
fragments.

I.E. if our base spec is http://foo.bar/base then the identifiers defined
therein should
be of the form http://foo.bar/base#X #Y #Z etc rather than the
http://foo.bar/base/PKCS7 
style I used.

This would also change RespondWith slightly so that the identifiers were all
nominaly
fragments off the default URI which would be the base URI for the spec.

All this means in practice is we introduce some # characters in several
spots.

		Phill

Phillip Hallam-Baker FBCS C.Eng.
Principal Scientist
VeriSign Inc.

781 245 6996 x227