Patch tested by compiling with `__attribute__ ((format (printf, 2, 3)))`
applied to `cmd_results_new`.
String usage constants have been converted from pointers to arrays when
encountered. General handler format strings were sometimes modified to
include the old input string, especially for unknown command errors.
Allows bar-subcommand to be a valid bar-ids
Destroys runtime created bar if trying to use a config only subcommand
Allow subcommands (except for id) to be ids
