CLEANUP: examples: shut up warnings in transparent proxy example

Just add some missing timeouts.
diff --git a/examples/transparent_proxy.cfg b/examples/transparent_proxy.cfg
index b9a881d..0ecb20d 100644
--- a/examples/transparent_proxy.cfg
+++ b/examples/transparent_proxy.cfg
@@ -6,6 +6,11 @@
 #
 
 global
+defaults
+	timeout client		30s
+	timeout server		30s
+	timeout connect		30s
+
 frontend MyFrontend
 	bind	192.168.1.22:80
 	default_backend		TransparentBack_http