HTTP/2: per-iteration stream handling limit. To ensure that attempts to flood servers with many streams are detected early, a limit of no more than 2 * max_concurrent_streams new streams per one event loop iteration was introduced. This limit is applied even if max_concurrent_streams is not yet reached - for example, if corresponding streams are handled synchronously or reset. Further, refused streams are now limited to maximum of max_concurrent_streams and 100, similarly to priority_limit initial value, providing some tolerance to clients trying to open several streams at the connection start, yet low tolerance to flooding attempts.

# Copyright (C) Igor Sysoev
# Copyright (C) Nginx, Inc.


ngx_include="unistd.h";      . auto/include
ngx_include="inttypes.h";    . auto/include
ngx_include="limits.h";      . auto/include
ngx_include="sys/filio.h";   . auto/include
ngx_include="sys/param.h";   . auto/include
ngx_include="sys/mount.h";   . auto/include
ngx_include="sys/statvfs.h"; . auto/include
ngx_include="crypt.h";       . auto/include