*) Bugfix: socket leak when using HTTP/2.
*) Bugfix: in the $realip_remote_addr variable.
*) Bugfix: graceful shutdown of old worker processes might require infinite time when using HTTP/2.
*) Bugfix: when using HTTP/2 and the "limit_req" or "auth_request" directives client request body might be corrupted; the bug had appeared in 1.11.0.
*) Bugfix: in the ngx_http_v2_module. Thanks to Piotr Sikora.
*) Bugfix: a segmentation fault might occur in a worker process when using HTTP/2.
*) Bugfix: when using HTTP/2 client request body might be corrupted.
*) Bugfix: in the ngx_http_v2_module. Thanks to Piotr Sikora.
*) Bugfix: in the ngx_http_v2_module. Thanks to Piotr Sikora.
*) Bugfix: when using HTTP/2 nginx might return the 400 response without logging the reason.
*) Bugfix: cache control headers were ignored when caching errors intercepted by error_page.
*) Bugfix: when using HTTP/2 client request body might be corrupted.
*) Bugfix: in the ngx_http_v2_module.
*) Bugfix: request processing rate might exceed configured rate when using the "limit_req" directive.
*) Workaround: some clients might not work when using HTTP/2; the bug had appeared in 1.13.5.
*) Bugfix: the "return" directive did not change the response code when returning errors if the request was redirected by the "error_page" directive.