[Specs-cx] CX Templates ownership

[nara hideki]

Hi, about CX Templates.

=Nat hinted that CX Templates may be fetched from any site if those
are securly proteced agaginst alterations. That can be. If so, I think
that templates don't have to be discovered by any identifier.

In those cases, we may have to define how to validate the ownership
the template. It can be the whitelisting.  If the owner is not the OP,
it is not so easy for the OP to validate the proposal.

Any idea welcome.

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hdknr