#103 add support for noip/ddns.net

[Shentino]

Netgear's dynamic dns has went out of service.

I'm currently using an account at noip with a .ddns.net hostname, and I think that ddns.net hostnames as well as general support for noip should be added to the default config file's commented suggestions

Downstream asked it to be filed up here.

downstream bug report: https://bugs.gentoo.org/708684