Introduced proxy_prefix to config

Change-Id: Ia632ad467670c017e90bc0bf78924a5801aa4cf2
diff --git a/Changes b/Changes
index 7b53f14..1c38987 100755
--- a/Changes
+++ b/Changes
@@ -1,7 +1,8 @@
-0.22 2017-04-24
+0.22 2017-05-17
         - Added user authentification using Kustvakts LDAP
           connection.
         - Added X-Forwarded-For.
+        - Introduced proxy_prefix as a configuration option.
 
 0.21 2017-02-01
         - Use textSigle for API communication instead of