Use 'can_interface_name' consistently everywhere.

[destogl]

There is a bit of a mix of can_interface_name and can_interface usage in some files and documentation.

I propose here that we use consistently everywhere can_interface_name to avoid confusion of users.

[hellantos]

Agreed. Wanted to fix that at some point, so greatly appreciated!

[hellantos]

We need to sync with #131.

[destogl]

Which do you want merge first?

[destogl]

Go with #131 then I can rebase