This is a beta release for 1.7 series, with following changes (including new features and minor bug fixes) from 1.6.1.

• [core] support for wildcard hostnames #634 (Kazuho Oku)
• [fastcgi] add support for CGI #618 (Kazuho Oku)
• [fastcgi] drop transfer-encoding header #641 (Kazuho Oku)
• [http2] fix HPACK encoder error (and crash) when trying to encode a token wo. hpack index #640 (Kazuho Oku)
• [mruby] provide env["rack.input"] #515 #638 #644 (Masayoshi Takahashi, Kazuho Oku)
• [mruby] HTTP client API #637 #643 (Kazuho Oku)
• [mruby] dump the ruby source on error #631 (Kazuho Oku)
• [mruby] provide access to $H2O_ROOT #629 (Kazuho Oku)
• [mruby] change mrb_int to 64-bit on 64-bit systems #639 (Kazuho Oku)
• [mruby] concatenate request headers having same name #666 (Kazuho Oku)
• [ssl] turn on neverbleed by default #633 (Kazuho Oku)
• [libh2o] fix race condition during multithread receiver (un)registration #659 (Chul-Woong Yang)
• [misc] support basic authentication using .htpasswd #624 (Kazuho Oku)