nghttp2: bump to 1.35.0

nghttp2: bump to 1.35.0

e520469b Update manual pages
54067256 Bump up version number to 1.35.0
c4d2eeee Update AUTHORS
f51e696e asio: Add stop() to listen_and_serve doc
a433b132 Merge pull request #1260 from nghttp2/h2load-non-final-response
cf48a56d Merge pull request #1238 from jktjkt/cmake-fix-libevent-detection
6cad1b24 nghttpx: Write mruby send_info early
3c393dca nghttpx: Fix assertion failure on mruby send_info with HTTP/1 frontend
17292445 h2load: Handle HTTP/1 non-final response
f6644a92 make clang-format
48998f72 Merge pull request #1222 from donny-dont/fix/declspec
15ff52f9 Update README
6c03bb14 Upgrade travis toolchain
524b4392 Fix travis build failure
859bf2bc Update manual pages
b5619fb1 h2load: Clarify that time for connect includes TLS handshake
dcbe0c69 nghttpx: Simplify move ctor and operator
2996c284 nghttpx: Cleanup
42e8ceb6 nghttpx: Convert API status code to enum class
1daf9ce8 nghttpx: Convert WorkerEventType to enum class
d68edf56 nghttpx: Convert MemcachedStatusCode to enum class
0c4e9fef nghttpx: Convert memcached op to enum class
571404c6 nghttpx: Convert MemcachedParseState to enum class
4d562b77 nghttpx: Convert LogFragmentType to enum class
e6225871 nghttpx: Convert connection check status to enum class
4bd075de nghttpx: Convert Http2Session state to enum class
b46a3249 nghttpx: Convert FreelistZone to enum class
4bd44b9c nghttpx: Convert dispatch state to enum class
1b42110d nghttpx: Make Downstream state enum class
0735ec55 nghttpx: Convert shrpx_connect_proto to enum class
00554779 nghttpx: Convert DNSResolverStatus to enum class
0963f389 nghttpx: Convert SerialEventType to enum class
1abfa3ca nghttpx: Make TLS handshake state enum class
f2159bc2 nghttpx: Convert UpstreamAltMode to enum class
b0eb68ee nghttpx: Convert shrpx_forwarded_node_type to enum class
e7b7b037 nghttpx: Convert shrpx_cookie_secure to enum class
5e4f434f nghttpx: Convert shrpx_session_affinity to enum class
20ea964f nghttpx: Convert shrpx_proto to enum class
d105619b src: Remove extra braces if possible
ec5729b1 Use std::make_unique
6c919695 Use C++14
46576178 Don't send Transfer-Encoding to pre-HTTP/1.1 clients
5e925f87 Update doc
153531d4 nghttpx: Use the same type as standard stream operator<<
f7287df0 Bump up version number to 1.35.0-DEV

Signed-off-by: Hans Dedecker <dedeckeh@gmail.com>
(backported from a0d5acfbe2bd4f9423d08d88706456e0bd62d4ce)