nghttp2 v0.6.6

• Implements h2-14 protocol (http://tools.ietf.org/html/draft-ietf-httpbis-http2-14)
• Implements HPACK 09 (http://tools.ietf.org/html/draft-ietf-httpbis-header-compression-09)
• Merged draft-15 features. Framing is binary compatible with draft-14, so we still use h2-14 for interop.
• Fix heap-use-after-free bug in priority handling code
• Fix some other bugs in priority code
• nghttp: -v option now can be accepted several times to increase verbosity
• nghttpx: Add NOTICE log level, which is now default.
• nghttpx: Fix doc so that WARN is right log level name, WARNING was typo.
• nghttpx: Implement dynamic TLS record size
• h2load: Print SSL/TLS cipher name and parameters