encoding newlines in attribute values

[Johnny Bufu]

The core spec doesn't allow newline characters ("\n") in any openid.*  
values. Currently, Attribute Exchange doesn't specify a way to encode  
newlines in attribute values.

At a minimum, we could specify a way to escape just the \n character.  
Other option would be to do something more generic, e.g. URL-encoding  
the values.

What do you think would work best?


Johnny