seneschal: Update proto comments

Update some comments in the seneschal .proto file to reflect changes in
behavior on the server.

BUG=chromium:703939
TEST=none

Change-Id: I0af63d03eda9b585f2cb1519d1f786c1649658d4
Signed-off-by: Chirantan Ekbote <chirantan@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1186133
Reviewed-by: Stephen Barber <smbarber@chromium.org>
Reviewed-by: Dylan Reid <dgreid@chromium.org>
1 file changed