[FEATURE REQUEST] Jinja filter for wrapping IPv6 addresses in brackets ([ ])

[ggiesen]

Is your feature request related to a problem? Please describe.
A great deal of software that IPv6 addresses for configuration files, especially when a port or url is specified, to be wrapped in brackets ([ ]). There's currently no clean or easy way to do this (that I'm aware of )

Describe the solution you'd like
A jinja filter like Ansibles ipwrap() ( https://docs.ansible.com/ansible/latest/user_guide/playbooks_filters_ipaddr.html#wrapping-ipv6-addresses-in-brackets )

Describe alternatives you've considered
Using something like the following:

{{ address if not address|is_ipv6 else ['[', address, ']']|join }}

But this will wrap IPv6 addresses with CIDR masks incorrectly. ie 2001:db8::1/64 becomes [2001:db8::1/64] instead of [2001:db8::1]/64.