gub/env_cmd.go: allow lookup by name.
gub/location.go: Show return type on return event.
trace.go: add name for switch condition
gub/setpping.go: allow "fin" as alias for "finish"
gub/whatis_cmd.go: include lookup by environment
run_cmd.go, gub.sh, gub.go: add restart. help_cmd.go: revise text. location.go: more better
Correct help text on "help" and "whatis". Add "help cateories". Better param value display. Expect more here.