Bump up the core size limit if CoreDumpDirectory is
configured.

Upstream-Status: Was discussed but there are competing desires;
	there are portability oddities here too.

--- httpd-2.4.1/server/core.c.corelimit
+++ httpd-2.4.1/server/core.c
@@ -4433,6 +4433,25 @@ static int core_post_config(apr_pool_t *
     }
     apr_pool_cleanup_register(pconf, NULL, ap_mpm_end_gen_helper,
                               apr_pool_cleanup_null);
+
+#ifdef RLIMIT_CORE
+    if (ap_coredumpdir_configured) {
+        struct rlimit lim;
+
+        if (getrlimit(RLIMIT_CORE, &lim) == 0 && lim.rlim_cur == 0) {
+            lim.rlim_cur = lim.rlim_max;
+            if (setrlimit(RLIMIT_CORE, &lim) == 0) {
+                ap_log_error(APLOG_MARK, APLOG_NOTICE, 0, NULL,
+                             "core dump file size limit raised to %lu bytes",
+                             lim.rlim_cur);
+            } else {
+                ap_log_error(APLOG_MARK, APLOG_NOTICE, errno, NULL,
+                             "core dump file size is zero, setrlimit failed");
+            }
+        }
+    }
+#endif
+
     return OK;
 }