Change the GSS loop description to by-reference

Cite a central document for the overall structure, and describe
only app-specific bits.

Change-Id: Ice318aa038b970d9056462e6c561666870209e74
Attempt to consolidate GSS loop texts

We have a few extra things to say in addition to the standard
loop description.  Try to get related things in one place.
Probably still needs more cleanup for readability.

Change-Id: Ia19df406f73aef146cfad8aa32d0e9b84bfa643d
Another round of editing

Change-Id: I2dc3da2a6179bf2f9c157abb95b5d3b0f7d0323f
More edits

Change-Id: I237c351b5ff8162fee81c7d928ff32b437440b0a
Whoops, missed a spot

Doing the message protection with partially complete security
contexts thing is not worth the effort for reporting errors.

Change-Id: Ide49b3c54e165ac00816f6ca3d932b28c4eb416b
Grammar

Change-Id: Ie6a0b7093e0747f4f6e57c15ac129b8ed7a17bc4
Remove unnecessary text

rx aborts and the gss_major_status field have the same level of
protection (none).

Change-Id: I9f85805828c7e53cadee1f21c8448fd399bf9070
Try to be more concise about the required flags

Just say they are required and try to defer to the GSSLOOP spec.

Change-Id: I0cd866b9cb95ec78493877b7a70b4aef68c2c805
Shuffle some content around

Remove a generic remark about GSS loops, too; that can be
found in the generic document.

Change-Id: Ib1769d5e53733b6fdba2123e35d1f024b8777f04
All GSS errors go in the GSS codes

No need to talk separately about negotiation and token prep.

Change-Id: I22f6adcc2c6a7bfd2433da7cf585847f6bbece59
Roll changelog

Change-Id: I9ea9d6a2c29f798ff6571e772c497636e669f3e3
Make draft-wilkinson-afs3-rxgk-08

Change-Id: If295214e189169cc56529043d9a139afb000fd3b