Parametrized script

[amreo]

I maked some option customizable

[syntaxerrormmm]

Configuration of the wan0 interface should be mainly avoided on setup playbook, so probably the two commits 80c2634 and 6ce22a7 would be discarded as soon we will remove the breaking code (reference issue #21).

The other issue (putting the local user for clients within domain.yml) is debatable at least:

• domain.yml would be put on the client, also
• I would like to distinguish between "public" information (like the ones already written in domain.yml) and other ones that should be kept secret (passwords, for example).

Someone proposed to devise a simple GUI application to generate domain.yml and other configuration files in simple and easy way.

What do you think @paspo @pfinardi and @enricobacis?