Log Message:
ruby-http: update to 3.0.0.

pkgsrc changes:
- sort DEPENDS

Upstream changes (from CHANGES.md):

## 3.0.0 (2017-10-01)

* Drop support of Ruby `2.0` and Ruby `2.1`.
  ([@ixti])

* [#410](https://github.com/httprb/http/pull/410)
  Infer `Host` header upon redirects.
  ([@janko-m])

* [#409](https://github.com/httprb/http/pull/409)
  Enables request body streaming on any IO object.
  ([@janko-m])

* [#413](https://github.com/httprb/http/issues/413),
  [#414](https://github.com/httprb/http/pull/414)
  Fix encoding of body chunks.
  ([@janko-m])

* [#368](https://github.com/httprb/http/pull/368),
  [#357](https://github.com/httprb/http/issues/357)
  Fix timeout issue.
  ([@HoneyryderChuck])