Review how "help" works

[jensdrenhaus]

Initially, the idea was to print the help text of the main module of a command.

Alternative proposal:
Print the command's description followed by the help messages of all used modules.
The help messages of the modules should dynamically include the module configuration.

Maybe there should be two methods in the module interface instead of "help": "info" and "usage".
In the mentioned proposal, the "info" method is called on all modules of a command, except from the main module. For the main module, the "usage" function is called.

The "info" functions prints module information including configured settings, whereas the "usage" function gives information on what cmd line arguments can be used.