HTTP/2 C library and tools

Nghttp2 v1.33.0

We have released nghttp2 v1.33.0.


RFC 8336 ORIGIN frame support has been added.

The value of SETTINGS_MAX_CONCURRENT_STREAMS is now set to unlimited if a remote peer does not explicitly include it in SETTINGS frame. Previously, it remains the initial value, 100.


Configuring local address for cleartext connection has been added.


mruby parameter has been added to backend option. mruby parameter specifies the path to mruby script file which is executed when the particular pattern is selected.

Fix bug which causes worker process to abort if neverbleed daemon process is killed before deleting SSL_CTX object.

Fix bug that stream is reset if request body is arrived before backend is selected.