VMware UAG deploy hook

[andrewheberle]

This is an initial version of a deploy hook for VMware's UAG appliance.

The SSL certificate is deployed via a REST API call using curl against the specified UAG appliance.

This replaces the "end_user" certificate only, not the "admin" interface certificate.

The error checking in this hook is somewhat lacking at them moment.

[Neilpang]

please also update your usage here: https://github.com/Neilpang/acme.sh/wiki/deployhooks

And then create an issue for future bugs: https://github.com/Neilpang/acme.sh/wiki/DNS-API-Dev-Guide#10-please-create-a-new-issue-for-future-bugs