set env to be honored later

radicale.wsgi

@@ -3,4 +3,8 @@ Radicale WSGI file (mod_wsgi and uWSGI compliant).
 
 """
 
+import os
 from radicale import application
+
+# set an environment variable
+os.environ.setdefault('SERVER_GATEWAY_INTERFACE', 'Web')