Enable mod_dumpio logging when available.

git-svn-id: https://svn.apache.org/repos/asf/httpd/test/framework/trunk@1896756 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/t/conf/extra.conf.in b/t/conf/extra.conf.in
index 57ae4c4..ab6995a 100644
--- a/t/conf/extra.conf.in
+++ b/t/conf/extra.conf.in
@@ -1447,3 +1447,9 @@
 	</IfModule>
 </IfModule>
 
+<IfModule mod_dumpio.c>
+	DumpIOInput on
+	DumpIOOutput on
+	LogLevel dumpio:trace7
+</IfModule>
+