Make Identifier field voluntary and fix the readme

[jankrib]

This field is useful for those who care about unique ids. It should be easy to skip, though. And the way it's described in the readme doesn't make sense.

[jankrib]

Feel free to add to the issue @skela, since it was you that introduced it.

[skela]

Yeah it's just a nickname or reference. Useful for some, I like being able to name my things so 😂

It was meant to be optional sure, I thought it defaulted to use the ip address if missing.

[skela]

Although having the ip as a fallback identifier is pretty awful if I think about it.

Maybe it could default to "XComfort Bridge" unless identifier is supplied?

[jankrib]

"XComfort Bridge" makes sense as a default.

[jankrib]

Fixed this is the last build