Document the behavior or the new --notes, --notes=<ref> and --no-notes
options, and list --show-notes[=<ref>] and --[no-]standard-notes options
as deprecated.
Signed-off-by: Johan Herland <johan@herland.net> Acked-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>