Add support for selfhost.de

[RMerl]

Selfhost.de's DynDNS service uses a syntax compatible with inadyn's generic plugin. The following config file has been successfully tested with inadyn 2.4:

custom selfhost {
        ddns-server = carol.selfhost.de
        ddns-path = "/nic/update?hostname=%%h&myip=%%i"
        hostname = HOSTNAMEselfhost.eu
        username    = "userid"
        password    = "password"
        ddns-response = {"nochg", "good" }
}

The ddns-response line can be dropped after 2.4, now that plugins/generic.c can recognize the nochg response.

Authentication is done through Basic HTTP.

This could probably be easily be supported natively based on these info. I have a test account I'd be willing to privately share with the developer if needs be (that account was only used in my own work in adding support for it in my Asuswrt-Merlin project).

[troglobit]

Shouldn't be too difficult to fix. I'm a bit stressed out over other, more pressing, matters and projects atm., but anyone can help out. It looks very much like you can cut-and-paste a working plugin from just about any of the other ones.

[jorhett]

@RMerl god knows you know how to create a PR right? ;-)

[RMerl]

@jorhett While I've been doing dev work with Github for 6 years now, it was actually the first time I created a PR for another project.

Don't know if I'll have the time to work on a selfhost plugin myself, currently busy with my own project's release schedule.

[troglobit]

Hmm, they do look very similar to other Dyn.com clones. I can whip up speculative support on master if someone else can test it.

Do you know if they have a dedicated, or recommended, checkip-server?

[troglobit]

If anyone could test e810cc3 I'd be very happy :)

[RMerl]

I should be able to test it later today.

I can also email you my DDNS login credentials if you want to test it right now.

[RMerl]

Can't find anything about a dedicated IP checker, but I did find this extended API documetnation:

https://selfhost.de/cgi-bin/selfhost?p=document&name=api

[troglobit]

@RMerl Thanks, much appreciated. If we can have this tested today I can do a new release tomorrow, or Saturday at the latest.

Yeah, I found that PDF too. Nothing much to add from what we (I) already know about how Dyn works,
so chances are good this will work. The currently hard coded checkip-server uses Dyn's checkip by default.

[RMerl]

Login credentials emailed.

[RMerl]

I was just about to send a pull request for the register/unregister - just finished testing it successfully on my end.

[troglobit]

@RMerl thank you for that, and sorry for missing the register/unregister stuff before. Having loging creds speeded up testing considerably! :)