Log Message:
Changes 2.2.0:
[core] add crash-handler.wait-pipe-close parameter 1092 (Frederik Deweerdt)
[core] introduce an option to bypass the server header sent from upstream 1226 \ 
(Frederik Deweerdt)
[core] apply global- and host-level configuration to requests not applicable to \ 
any of the path-level configurations 1231 (Kazuho Oku)
[access-log] add %{remote}p for logging the remote port 1166 (Kazuho Oku)
[access-log] add support for JSON-style escapes and null 1208 (Kazuho Oku)
[access-log] add specifier for logging per-request environment variables 1221 \ 
(Yannick Koechlin)
[access-log] add support for <, > modifiers for logging either the \ 
original or the final response 1238 (Kazuho Oku)
[access-log] do not emit request-total-time twice 1017 (Kazuho Oku)
[fastcgi] fix a bug that closes the FastCGI listener socket during startup 1203 \ 
(Frederik Deweerdt)
[file] add directive for serving gzipped files, decompressing them on-the-fly \ 
1140 (Ichito Nagata)
[headers] fix buffer overrun during startup 1180 (Frederik Deweerdt)
[http1][proxy] preserve the cases of characters used in header names 1194 \ 
(Frederik Deweerdt)
[http1][proxy] fix undefined behavior in HTTP/1 parser 1189 (Frederik Deweerdt)
[http1] stop reading from socket after sending 400 to avoid the risk of \ 
assertion failure 1223 (Frederik Deweerdt)
[http2] recognize x-http2-push-only attribute on link header 1169 (Frederik Deweerdt)
[http2] add optional timeout for closing connections upon graceful shutdown 1108 \ 
(Frederik Deweerdt)
[http2] do not ack an acked PING frame 1175 (Moto Ishisawa)
[http2] reject requests exceeding the maximum allowed size more efficiently 1183 \ 
(Frederik Deweerdt)
[mruby] remove dependenty to mkmf 1197 (Yuki Kurihara)
[mruby] correct the line number reported on an exception 1239 (Ichito Nagata)
[proxy] add directives for tweaking headers sent to upstream 1126 (Justin Zhu)
[proxy] retain case-sensitivity of unix socket paths 1131 (Frederik Deweerdt)
[proxy] add directive for controlling the via request header 1225 (Frederik Deweerdt)
[ssl] add directive for logging session ID 1164 (Yannick Koechlin)
[ssl] add support for TLS 1.3 draft-18 1204 (Kazuho Oku)
[ssl] stop evicting session entries in memcached when they are removed from \ 
internal cache 1185 (Ichito Nagata)
[ssl] fix crash when a secp384r1, secp521r1 certificate is used with TLS 1.3 \ 
1214 (Kazuho Oku)
[ssl] fix build failure with OpenSSL 1.1.0 1216 (Kazuho Oku)
[ssl] add doc for handshake-timeout 1233 (Kazuho Oku)
[status] fix race condition during start-up 1242 (Frederik Deweerdt)
[libh2o] implement h2o_evloop_destroy 1200 (kazan417)
[misc] add test code for fuzzing 1174 1182 1191 1192 (Frederik Deweerdt, \ 
Jonathan Foote)
[misc] fix issues reported by Coverity 1168 1172 1179 (Harrison Bowden, Frederik \ 
Deweerdt)