Require Libevent-openssl 2.0.8 because we use
evconnlistener_set_error_cb().

htparse is written by Mark Ellzey and part of libevhtp.
https://github.com/ellzey/libevhtp

The included code are modified by me for bugfixes.
See my fork:
https://github.com/tatsuhiro-t/libevhtp/tree/master/htparse

I think spdylay supports writing only partial frames.

The default log level is now WARNING.

Put libhtparse in examples/htparse

This option sets maximum receive buffer size for incoming control
frame.  Basically the library checks the length field of the incoming
control frame. For frames with name/value header block, the library
also checks the length of inflated block is also under the limit. This
is done while incrementally inflating block. If the length of frames
with name/value header block exceeds the limit, the library will issue
RST_STREAM with FRAME_TOO_LARGE. For other frames, it will issue
GOAWAY.