Added wildcard API key information

[wvteijlingen]

See https://github.com/bunq/doc/issues/71. I think it would also be a good idea to add this to the documentation for the actual POST device-server call.

(PS: The URL in this paragraph is also out of date, but I've left it in because that's a different issue.)

Closes #71

[OGKevin]

@wvteijlingen for the sake of clarity, have you tried this and confirmed it working ? As by my knowledge, if you do this with the /ip endpoint you will get an exception. I just want to be sure if this has been confirmed in practice.

[wvteijlingen]

I'm using the permitted_ips field when POSTing a device-server. This does not result in an error response. I did not check if the whitelisting itself actually works. I assume it does since a Bunq employee pointed out this feature.

I did not use it with the /ip endpoint so I do not know if that results in an exception.

[OGKevin]

@JordyHeemskerk of @kojoru please conform that /ip still throws exception. Unless I’m missing something 😅

[Crecket]

Apparently this has always been possible so I think this can be merged

[OGKevin]

@wvteijlingen FYI 🙃

[wvteijlingen]

👍