该版本改进内容包括：
修复两个跟 Content-Length 相关的bug
Support for bourne-like "here"-documents in the command line interface, allowing<<__EOF__ and similar schemes.
Fixed an issue with re-using connections after Chunked-Encoding.
Fix a bug that would inflate the "lost header" count and could cause problems during heavy traffic over a single connection, typically seen by load testing.
Use the time of cache-insertion for "If-Modified-Since" requests if a "Last-Modified" header isn't provided by the backend.
Merge multi-line Vary and Cache-Control headers from clients, which Google Chromium seem to split up.
构建方面的修复和文档的完善
Various bug fixes.
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