Log Message:
Update ruby-http to 0.8.12.

pkgsrc change: allow build on Ruby 2.2.

## 0.8.12 (2015-05-26)

* Fix `HTTP.timeout` API (was loosing previously defined options). (@ixti)

## 0.8.11 (2015-05-22)

* SNI support for HTTPS connections. See #229. (@tarcieri)
* Use "http.rb" in the User-Agent string. See #227. (@tarcieri)

## 0.8.10 (2015-05-14)

* Fix cookie headers generation. (@ixti)

## 0.8.9 (2015-05-11)

* Add cookies support. (@ixti)
* Enforce stringified body encoding. See #219. (@Connorhd)

## 0.8.8 (2015-05-09)

* Fix CONNECT header for proxies. See #217. (@Connorhd)

## 0.8.7 (2015-05-08)

* Fix `HTTP.timeout` API with options only given. (@ixti)

## 0.8.6 (2015-05-08)

* Reset global timeouts after the request finishes. See #215. (@zanker)

## 0.8.5 (2015-05-06)

* Add simple timeouts configuration API. See #205. (@ixti)
* Deprecate `Request#request_header`. Use `Request#headline` instead. (@ixti)

## 0.8.4 (2015-04-23)

* Deprecate `#default_headers` and `#default_headers=`. (@ixti)
* Deprecate chainable methods with `with_` prefix. See #207. (@ixti)
* Add support of HTTPS connections through proxy. See #186. (@Connorhd)

## 0.8.3 (2015-04-07)

* Fix request headline. See #206. (@ixti)
* Remove deprecated `Request#__method__`. (@ixti)

## 0.8.2 (2015-04-06)

* Fix Celluloid::IO compatibility. See #203. (@ixti)
* Cleanup obsolete code. (@zanker)

## 0.8.1 (2015-04-02)

* Add missing `require "resolv"`. See #202. (@ixti)
* Add block-form `#persistent` calls. See #200, #201. (@ixti)

## 0.8.0 (2015-04-01)

* Properly handle WaitWritable for SSL. See #199. (@zanker)
* Add support for non-ASCII URis. See #197. (@ixti)
* Add configurable connection timeouts. See #187, #194, #195. (@zanker)
* Refactor requests redirect following logic. See #179. (@ixti)
* Support for persistent HTTP connections (@zanker)
* Add caching support. See #77 and #177. (@Asmod4n, @pezra)
* Improve servers used in specs boot up. Issue was initially raised up
  by @olegkovalenko. See #176. (@ixti)
* Reflect FormData rename changes (FormData -> HTTP::FormData). (@ixti)
* `HTTP::Headers` now raises `HTTP::InvalidHeaderNameError` in case of
  (surprise) invalid HTTP header field name (e.g.`"Foo:Bar"`). See #173.
  (@ixti)