This creates an <a href="... to a command in the Maypole app by catenating the base URL, table, command, and any arguments.
Note that the format of these links should match that parsed by the parse_path method found somewhere in your Maypole hierarchy (e.g.
in MasonX::Maypole).
p.s.
This is called mplink because it's reasonably likely that people will already have their own link-generating component called link in a shared component root.
