[Request]: IPv6: port forwarding

[jglogan]

Feature or enhancement request details

We should accept an IPv6 host address (enclosed in square brackets) or an IPv4 address for port forwards.

Example for forwarding port 8080 on IPv6 localhost to port 8000 on the container IPv6 link-local address:

container run -p '[::]:8080:8000' -d node:latest npx http-server -a :: -p 8000

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