nghttp2_hd: Refactor a bit
nghttp: Fix compile error and warning with libc++
h2load: Support ALPN
Update Third Party lib (http-parser)
nghttpx: Avoid 0-length DATA in HTTP/2 upstream
nghttpx: Refactor http2_data_read_callback
nghttpx: Send RST_STREAM with NO_ERROR when closing upgraded connection
Merge branch 'http_parser' of https://github.com/alagoutte/nghttp2 into alagoutte-http_parser
Merge branch 'alagoutte-http_parser'
nghttpx: Remove misleading logging
nghttpx: Write accesslog when upstream connection is lost for HTTP/2 and SPDY
Add contrib/.gitignore
Add features to logging, client and server port,
time_iso8601 and request_time.
fixed conflict
Merge branch 'LPardue-accesslog_port'
Implement faster formatting for format_iso8601 and format_common_log
nghttpx: Note the conversion made in <VAR>
nghttpx: Make --accesslog-format usage doc help2man friendly

This is unfortunate but help2man behaves badly when there is indented
lines in help messages in commnad-line args.  We removed indentations
to make help2man happy.
nghttpx: Add $pid to --accesslog-format variable

$pid refers to the PID of the running process.
nghttpx: Add $alpn variable to accesslog formatting

$alpn is a variable which represents ALPN identifier of the protocol
which generates the response.