DDDDEEEESSSSCCCCRRRRIIIIPPPPTTTTIIIIOOOONNNN
This master apply is called by ed() when a player
disconnects while in the editor and editing a file. This
function should return an alternate file name for the file
to be saved, to avoid overwriting the original.
NNNNOOOOTTTTEEEE
This apply used to be named get_ed_buffer_save_file_name().