Update to http-client-0.7.11

0.7.11
* Allow making requests to raw IPv6 hosts #477
* Catch "resource vanished" exception on initial response read #480
* Search for reachable IP addresses asynchronously (RFC 6555, 8305) after
  calling getAddrInfo to reduce latency #472.

0.7.10
* Consume trailers and last CRLF of chunked body. The trailers are not
  exposed, unless the raw body is requested.

0.7.9
* Exceptions from streamed request body now cause the request to
  fail. Previously they were routed through onRequestBodyException and, by
  default, the IOExceptions were discarded.

(pho)