core: follow up to r1839997: recycle request filters to a delayed ring first.

We want not only ap_filter_output_pending() to be able to access each pending
filter's *f after the EOR is destroyed, but also each request filter to do
the same until it returns.

So request filters are now always cleaned up into a dead_filters ring which is
merged into spare_filters only when ap_filter_recycle() is called explicitely,
that is in ap_process_request_after_handler() and ap_filter_output_pending().

The former takes care of recycling at the end of the request, with any MPM,
while the latter keeps recycling during MPM event's write completion.


git-svn-id: https://svn.apache.org/repos/asf/httpd/httpd/trunk@1840002 13f79535-47bb-0310-9956-ffa450edef68

modules/http/http_request.c

@@ -401,6 +401,10 @@ AP_DECLARE(void) ap_process_request_after_handler(request_rec *r)
     (void)ap_check_pipeline(c, bb, DEFAULT_LIMIT_BLANK_LINES);
     apr_brigade_cleanup(bb);
 
+    if (!c->aborted) {
+        ap_filter_recyle(c);
+    }
+
     if (c->cs) {
         if (c->aborted) {
             c->cs->state = CONN_STATE_LINGER;