Add "license" as a long-form command line option alongside the existing
"L" short option for showing license information. This maintains
consistent option naming patterns with other commands that provide both
short and long forms (help/?/help, etc.) and improves command line
usability by providing more descriptive option names.
So they don't clutter the standard help output.
-loglevel is marked because there is no need to show two options (-v and
-loglevel) that do the same thing.
