Introduce CSP headers to Kalamar (start of #72)

Change-Id: I84b7ff0accab3d783ad653fae123c25fee1d92b9
diff --git a/kalamar.conf b/kalamar.conf
index 38fc57f..63dad82 100644
--- a/kalamar.conf
+++ b/kalamar.conf
@@ -57,6 +57,9 @@
     ## Require everything to be send via https only:
     # https_only => 1,
 
+    ## Override default content security policy
+    # cs_policy => "default-src '*';"
+
     ## Set proxy timeouts
     # proxy_inactivity_timeout => 120,
     # proxy_connect_timeout => 120,