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   Copyright Tianfeng.Han [mikan.tenny@gmail.com]
   Copyright 2016-2017 Zan Group   <zan@zanphp.io>

   Licensed under the Apache License, Version 2.0 (the "License");
   you may not use this file except in compliance with the License.
   You may obtain a copy of the License at

       http://www.apache.org/licenses/LICENSE-2.0

   Unless required by applicable law or agreed to in writing, software
   distributed under the License is distributed on an "AS IS" BASIS,
   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   See the License for the specific language governing permissions and
   limitations under the License.

   Zan Group changed or modified files based on swoole’s version of 1.8.5-stable.
   see details as diff_sw1.8.5.diff

   Zan used Troy D. Hanson's Uhash and Ulist.
   Copyright (c) 2007-2014, Troy D. Hanson   http://troydhanson.github.com/uthash/

   Zan used multipart http_parser Based on node-formidable by Felix Geisendörfer.
   Igor Afonov - afonov@gmail.com - 2012
   MIT License - http://www.opensource.org/licenses/mit-license.php

   Zan used http_parser from Ryan Dahl.
   Copyright 2009,2010 Ryan Dahl <ry@tinyclouds.org>

   Zan used hiredis lib and SDS (Simple Dynamic Strings).
   Copyright (c) 2009-2011, Salvatore Sanfilippo <antirez at gmail dot com>
   Copyright (c) 2010-2014, Pieter Noordhuis <pcnoordhuis at gmail dot com>
   Copyright (c) 2015, Matt Stancliff <matt at genges dot com>,
                       Jan-Erik Rediger <janerik at fnordig dot com>