Updated mailto: binding

[<njones@ouno.com>]

All:

I just wanted to point up that I updated the WIKI for the mailto:
binding[1] some highlights are:

1. You can serve the email address in the XRD if you would like for the
address to be public (which could be for help@ex..., info@ex... and etc.)

2. If you want to keep the address private you only serve the domain which
can resolve the email address privately. Serving only the domain can also
be used to masquerade the resolution process if that is a need.

3. (and 4) you can direct the two above scenarios to another service which
would host the email address and either serve up the email address or
domain to send the address to.

I think the above works pretty well, within the principles of both XRI
(resolve) and SMTP (relay). I've set up http://shortxri.net to work using
methods 3 and 4.

I know we're still working through the XRD 2.0 format and LRRDs stuff so
the document may be out of sync or mix concepts, therefore I apologize in
advance and invite you all to use the power of the wiki and just-a-change
whatever is wrong.

Cheers,

Nika

[1]http://wiki.oasis-open.org/xri/XriThree/EmailBinding