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This document is basically ready. I have the following comments:

* LSA should be defined where it is first used.
* I'm curious what happens if a router sets the H-bit when it is on the only
feasible transit path.
* In the security considerations, the document states:

q( The feature, however does introduce the flooding of a capability
   information that allows discovery and verification that all routers
   in an area are capable before turning on the feature )

I'm not sure "flooding" is the right term here, as the communication
comprising the OSPF control plane is not new: only a single bit has a
new meaning. This statement is also worded awkwardly, but without
a clearer understanding of what is meant, I don't know that I can
suggest alternative wording.