* Added a 'LOGS.LOCK_USER_NAME' field to the database.
* Added a 'LOGS.LOCK_STATION_NAME' field to the database.
* Added a 'LOGS.LOCK_IPV4_ADDRESS' field to the database.
* Added a 'LOGS.LOCK_DATETIME' field to the database.
* Incremented the database version to 273.
* Added log locking logic to rdlogedit(1).
* Fixed a bug in 'lib/rdcart.cpp' that caused the 'Import' web API call
to return 404 when importing with 'CREATE' set to '1' and unique titles
enabled in the database.
* Added an entry for the Broadcast Tools SRC-16 in
'docs/SWITCHERS.txt'.
* Added a 'CUT_EVENTS' table to the database.
* Added a 'DECK_EVENTS' table to the database.
* Incremented the database version to 256.
* Implemented a 'Cut Event' ['CE'] RML.
* Added a 'Event Carts' section to the Edit Deck dialog in
'rdadmin/edit_deck.cpp' and 'rdadmin/edit_deck.h'.