diff -r 4fb62d791073 -r 155c29e0ed1c web/http_headers.py
--- a/web/http_headers.py	Tue Sep 15 17:10:58 2015 +0200
+++ b/web/http_headers.py	Fri Sep 18 14:29:53 2015 +0200
@@ -362,7 +362,7 @@
 
 def parseArgs(field):
     args = split(field, Token(';'))
-    val = args.next()
+    val = next(args)
     args = [parseKeyValue(arg) for arg in args]
     return val, args