8178109: More useful documentation on /help
Summary: For /help <command/subject>, show the help for the command/subject directly.
Reviewed-by: rfield
^build/
^dist/
^.idea/
nbproject/private/
^webrev
^.src-rev$
^.jib/
\.DS_Store
\.metadata/
\.recommenders/
test/nashorn/script/external
test/nashorn/lib
NashornProfile.txt