Adding ability to read proxy headers for proper url build.
+ README example fix

Change-Id: I1187e9e38e48e9ea3a32c3a53a284734b288306e
diff --git a/tests/pillar/server_cluster.sls b/tests/pillar/server_cluster.sls
index 549f916..e25b502 100644
--- a/tests/pillar/server_cluster.sls
+++ b/tests/pillar/server_cluster.sls
@@ -6,6 +6,7 @@
     cluster: true
     ttl: 86400
     event_alarm_topic: alarm.all
+    enable_proxy_headers_parsing: True
     bind:
       host: 127.0.0.1
       port: 8042