IPv6 support

[nitzmahone]

Looks like we don't properly parse IPv6 addresses or do the right thing in URLs. We're getting Failed to parse: fe80::578:efef:2ad5:aac3%vboxnet0:5985 when attempting to connect to a local address with a zone ID. Will probably need to get a little more clever to tease apart the host and port.

Also an open PR to fix one IPv6 issue: #92.

[knowledgewarrior]

@nitzmahone Was this issue fixed?

[jborean93]

IPv6 support is already in place, you just need to ensure the hostname is wrapped in [], e.g. [fe80::578:efef:2ad5:aac3%vboxnet0]:5985.