--- a/util/sasl/scram.lua	Tue Nov 17 11:03:54 2009 +0100
+++ b/util/sasl/scram.lua	Tue Nov 17 11:31:59 2009 +0100
@@ -60,7 +60,8 @@
 
 local function validate_username(username)
 	-- check for forbidden char sequences
-	
+	for eq in s:gmatch("=(.?.?)") do
+		if eq ~= "2D" and eq ~= "3D" then return false end end return true;
 	-- replace =2D with , and =3D with =
 	
 	-- apply SASLprep