This is a bug-fix release of 1.7 series, fixing following issues found in 1.7.0.

• [core] fix incorrect line no. reported in case of YAML syntax error #785 (Kazuho Oku)
• [core] fix build issue / memory leak when the poll backend is used #777 #787 (devlearner)
• [core] when building, repect EXTRA_LIBS passed from command line #793 (Kazuho Oku)
• [core] fix memory leaks during start-up #792 (Domingo Alvarez Duarte)
• [core] fix stability issue when receiving a signal #799 (Kazuho Oku)
• [fastcgi] fix off-by-one buffer overflow #762 (Domingo Alvarez Duarte)
• [fastcgi][mruby] install missing script files #791 #798 (AIZAWA Hina)
• [mruby] truncate body to the size specified by content-length #778 (Kazuho Oku)
• [mruby] fix error when reading a ruby script >= 64K #824 (Domingo Alvarez Duarte)
• [proxy] fix I/O error when transferring files over 2GB on FreeBSD / OS X #821 #834 (Kazuho Oku)
• [ssl] bugfix: use of session ticket not disabled even when configured to #819 #835 (Kazuho Oku)
• [libh2o] provide pkg-config .pc files #743 (OGINO Masanori)
• [libh2o] include version numbers in the .so filename #794 (Matt Clarkson)
• [doc] refine documentation #601 #746 #748 #766 #781 #811