HttpComponents Client 4.5.2发布

HttpComponents Client 4.5.2 发布了，改进记录：

Changelog:
-------------------

* [HTTPCLIENT-1710, HTTPCLIENT-1718, HTTPCLEINT-1719] OSGi container compatibility improvements.
  Contributed by 212427891 <munene.kiruja at ge.com>

* [HTTPCLIENT-1717] Make fluent API Content#Content(byte[], ContentType) public.
  Contributed by Cash Costello <cash.costello at gmail.com>

* [HTTPCLIENT-1715] NTLMEngineImpl#Type1Message not thread safe but declared as a constant.
  Contributed by Olivier Lafontaine <olafontaine at gmail.com>, Gary Gregory <ggregory at apache.org>

* [HTTPCLIENT-1714] Add HttpClientBuilder#setDnsResolver(DnsResolver).
  Contributed by Alexis Thaveau <alexis.thaveau at gmail.com>

* [HTTPCLIENT-1712] SPNego schemes to take service scheme into account when generating auth token.
   Contributed by Georg Romstorfer <georg.romstorfer at gmail.com>

* [HTTPCLIENT-1700] Netscape draft, browser compatibility, RFC 2109, RFC 2965 and default cookie
  specs to ignore cookies with empty name for consistency with RFC 6265 specs.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* [HTTPCLIENT-1704] IgnoreSpec#match to always return false.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* [HTTPCLIENT-1550] Fixed 'deflate' zlib header check.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* [HTTPCLIENT-1698] Fixed matching of IPv6 addresses by DefaultHostnameVerifier
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* [HTTPCLIENT-1695] RFC 6265 compliant cookie spec to ignore cookies with empty name / missing
  value.
  Contributed by Oleg Kalnichevski <olegk at apache.org>

* [HTTPCLIENT-1216] Removed ThreadLocal subclass from DateUtils.
  Contributed by Jochen Kemnade <jochen.kemnade at eddyson.de>

* [HTTPCLIENT-1685] PublicSuffixDomainFilter to ignore local hosts and local domains.
  Contributed by Oleg Kalnichevski <olegk at apache.org>