"later-texts-exists" in "Text-Mapping" to "more-texts-exists",
	so that it is useful for the new requests defined below.
	Updated the descriptions of some fields for the same purpose.
(local-to-global): Added a link to local-to-global-reverse.
(map-created-texts): Added a link to map-created-texts-reverse.
(set-connection-time-format): Added a missing protocol number.
(local-to-global-reverse): New request.
(map-created-texts-reverse): New request.