The draft is ready with nits

A couple of typos:
In section 4.2.1 "Procedures how features" should probably be
something like "The procedure by which features"
4.2.2 tense doesn't match "The procedures in the section applies"
should be "apply"

This draft is basically just being able to advertise your capabilities
to another node.  As the security considerations section points out,
this could divulge information that might be sensitive.

Radia