Changes with Apache 2.4.24
+ *) core: avoid adding multiple subrequest filters when there are nested
+ subrequests. PR58292
+
+ *) mod_http2: connection shutdown revisited: corrected edge cases on
+ shutting down ongoing streams, changed log warnings to be less noisy
+ when waiting on long running tasks. [Stefan Eissing]
+
+ *) mod_http2: changed all AP_DEBUG_ASSERT to ap_assert to have them
+ available also in normal deployments. [Stefan Eissing]
+
+ *) mod_http2/mod_proxy_http2: 100-continue handling now properly implemented
+ up to the backend. Reused HTTP/2 proxy connections with more than a second
+ not used will block request bodies until a PING answer is received.
+ Requests headers are not delayed by this, since they are repeatable in
+ case of failure. This greatly increases robustness, especially with
+ busy server and/or low keepalive connections. [Stefan Eissing]
+
+ *) mod_proxy_http2: fixed duplicate symbols with mod_http2.
+ [Stefan Eissing]
+
*) mod_http2: rewrite of how responses and trailers are transferred between
master and slave connection. Reduction of internal states for tasks
and streams, stability. Heuristic id generation for slave connections
*) core: CVE-2016-5387: Mitigate [f]cgi "httpoxy" issues.
[Dominic Scheirlinck <dominic vendhq.com>, Yann Ylavic]
+ *) mod_proxy_{http,ajp,fcgi}: don't reuse backend connections with data
+ available before the request is sent. PR 57832. [Yann Ylavic]
+
*) mod_proxy_balancer: Prevent redirect loops between workers within a
balancer by limiting the number of redirects to the number balancer
members. PR 59864 [Ruediger Pluem]