Module IPv6 CWP

[JosePP]

Module IPv6: https://github.com/coriaweb/cwpipv6

I am attaching what we have programmed so far, in case it can be useful to the CWP team to speed up the implementation.

We have had it down for a while, because our provider dropped the IPv6 connection, so we will restart this system.

I put it if you want to review it and it can be useful for someone or even to receive improvements from you.

Greetings!