C2MS11 — In message Archive Message Retrieval Response, fix Header field names

Typo in the diagram only for Archive Message Retrieval Response calls the Header fields it uses MSG-TYPE and MSG-SUBTYPE. They should be MESSAGE-TYPE and MESSAGE-SUBTYPE, respectively. See page 64, figure 8-5.

Do this in 1.1

Fix Typos in Figure.

Note if accepted along with other proposals that alter figures, there will be a rollup figure changes issue that will contain all the before and after pics to be voted on and submitted for final set of figure changes.