Fix -h option description
Currently if you run moss with no arguments the output is as follows: /bin/moss: [command] [--options]
Options: --version Show the program version and exit -D --destdir Set the system root -h --help This help information.
This is incorrect as adding the option -h will change the output so "this" can't be the help information. This commit changes the description to the better fitting "Show help information" which properly describes the option.
Signed-off-by: Sam Smith sam.henning.smith@protonmail.com