Log Message:
Updated wip/php-http to 1.7.0.

Version 1.7.0:
* Added generic http_negotiate() function (FR#17338)
* Added request options:
- proxytunnel: enable tunelling through the HTTP proxy
- noproxy: comma separatet list of hosts (* means all hosts) not to use
  a proxy for (libcurl >= 7.19.4)
* Added postredir request options constants:
- HTTP_POSTREDIR_301
- HTTP_POSTREDIR_302
- HTTP_POSTREDIR_ALL
* Added authtype request option constant:
- HTTP_AUTH_DIGEST_IE
* Added proxytype request option constants:
- HTTP_PROXY_HTTP_1_0
* Added request info members:
- condition_unmet (libcurl >= 7.19.4)
* Fixed bug #16893 (Content not decoded with zlib support and
  compress enabled)
* Fixed bug #17087 (http_build_cookie() exhausts memory if
  cookie value is NULL)
* Fixed bug #17169 (Wrong return value of HttpMessage::getHttpVersion())

Version 1.7.0b2:
* Added request options:
- proxytunnel: enable tunelling through the HTTP proxy
- noproxy: comma separatet list of hosts (* means all hosts) not to use
  a proxy for (libcurl >= 7.19.4)
* Added postredir request options constants:
- HTTP_POSTREDIR_301
- HTTP_POSTREDIR_302
- HTTP_POSTREDIR_ALL
* Added authtype request option constant:
- HTTP_AUTH_DIGEST_IE
* Added proxytype request option constants:
- HTTP_PROXY_HTTP_1_0
* Added request info members:
- condition_unmet (libcurl >= 7.19.4)

Version 1.6.6:
* Fixed a Last-Modified caching bug in http_send API
* Fixed bug with HttpRequestPool and libevent when adding requests while
  running
* Fixed memory leak in HttpResponse::getStream() (Felipe Pena)
* Fixed bug #14382 (PHP crash after casting scalar argument to an array
  in HttpQueryString)
* Fixed bug #16533 (http_redirect fails with url->port==0)