This is the first beta release of version 2.2, with following new features and improvements.

• [core] add crash-handler.wait-pipe-close parameter #1092 (Frederik Deweerdt)
• [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)
• [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)
• [proxy] add directives for tweaking headers sent to upstream #1126 (Justin Zhu)
• [proxy] retain case-sensitivity of unix socket paths #1131 (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)
• [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)