cli: Don't shadow --name option for add subcomands

[samueldr]

Fixes #128.

To be brutally honest: I did not check for pypi, but given the way Rust is, I have full confidence that it was broken like channel was, and that the fix will work.

And to be clear: I have verified that the changed implementation works for the channel type.

[piegamesde]

How, that's a hell of a footgun clap fired there