Adding ability to read proxy headers for proper url build.

Change-Id: Icbc74a56f375c76595f6d901dd32354d61673b0d
diff --git a/README.rst b/README.rst
index 4ef4bbe..6c32a71 100644
--- a/README.rst
+++ b/README.rst
@@ -41,6 +41,7 @@
         admin_name: admin
         admin_password: 'adminpwd'
         admin_email: stackmaster@domain.com
+        enable_proxy_headers_parsing: True
         roles:
           - admin
           - Member