Some general grammar/style fixes

s/undergo/undertake/ was from jhutz.
Request registration for the RXGK_ package and RPCs
Roll changelog
Make draft-wilkinson-afs3-rxgk-10
De-tabify artwork

Don't use tabs for indentation, they don't render as 8 spaces-equivalent.

Also standardize on a four-space internal indentation for structure
contents, etc..

Change-Id: Ie4fa5004b564eebea1273007cd5b698ba7a1ef3c
Allow combined tokens for AFSCombineTokens

Restricting the token0 and token1 arguments to have come from
GSSNegotiate is overly restrictive and eliminates the benefit
of the CombineTokens RPC for use with AFS.

Permit any token valid for the vlserver as an argument.

Note that the output token from AFSCombineTokens is valid for
a fileserver only, and therefore may not be passed as an input
argument to AFSCombineTokens.

Change-Id: I4fb0ec36541ba7ae5a48c15dea5d1ee6ae2a084b
Emphasize the non-combinability of printed tokens

This restrictino is global, it is not specific to AFSCombineTokens.

Change-Id: I7699299b172cc69766454b87ad49afb92f9d649b
A round of editing

Lots of changes that struck me as I was reading the document after
a long hiatus.

Most notably, add clarity about the cache manager identity and how
it is stored in file server tokens, noting its absence from database
server tokens.  To effect this, a new kind of PrAuthName is needed
(PRAUTHTYPE_EMPTY).

Make clear the distinction between database server tokens and file
server tokens, as they are conceptually distinct and definitely
not interchangable.  Both types are different from "standard" rxgk
tokens, since they are valid for groups of services.

AFSCombineTokens is the only way to obtain file server tokens.

Add limits to the size of some opaque fields.

General editing for grammar, etc..

Change-Id: Ib2c613cf14bf78775e03ebcfc87449b592217a53
Roll changelog

Change-Id: I78811985e6c088322142f432bb067652bcc3e622
Make draft-wilkinson-afs3-rxgk-afs-04

Change-Id: Id5ca577ec814851b69028b32957ef4d30c7cb44d
Add a clarification about the RFC 4402 PRF+ erratum

rxgk should use the text as-is.

Change-Id: I2c368467660179e3b339b2068fbfc0d9d1ffc61f