Add IPv6 support to address parsing and unparsing to ng_ksocket.
Submitted by: Neel Chauhan <neel AT neelc DOT org>
Keep in mind that this is a DRAFT. Things still need to be done, including:
* Fix the "ngctl: send msg: Invalid argument" error - I don't know where this fails
* Scope ID
* Man page changes about this feature
* Anything more commenters want