This is a new beta release for 2.0 series, including bug fixes and a security fix. Users of version 2.0.0-beta4 or earlier are encouraged to update to the latest version.

• [security fix][http2] fix use-after-free on premature connection close (CVE-2016-4817) #920 (Frederik Deweerdt)
• [core] fix SIGBUS when temporary disk space is full #910 (Kazuho Oku)
• [core] add directive for customizing the path of temporary buffer files #911 (Kazuho Oku)
• [http2] fix potential stall when http2-max-concurrent-requests-per-connection is set to a small number #912 (Kazuho Oku)
• [http2] refuse push a single resource more than once #903 (Kazuho Oku)
• [mruby] do not drop link header #913 (Kazuho Oku)
• [mruby] fix memory leak during initialization #906 (Frederik Deweerdt)
• [mruby] fix race condition in mruby regex handler #908 (Kazuho Oku)
• [libh2o] fix crash in h2o_url_stringify #918 (Kazuho OKu)