Changes with Apache 2.3.11
+ *) core: new hook: ap_run_pre_read_request. [Jim Jagielski]
+
+ *) mod_cache: When a request other than GET or HEAD arrives, we must
+ invalidate existing cache entities as per RFC2616 13.10. PR 15868.
+ [Graham Leggett]
+
*) modules: Fix many modules that were not correctly initializing if they
were not active during server startup but got enabled later during a
graceful restart. [Stefan Fritsch]