[Dovecot] Trim trailing whitespace from username

[Timo Sirainen]

On Fri, 2008-05-16 at 00:48 -0700, David Jonas wrote:
> Recently we changed Postfix to use Dovecot for our SASL authentication 
> and we ran into trouble with some of our clients having extraneous 
> spaces at the end of their usernames. The quick fix was to add a space 
> to username_chars. The slightly longer fix was a pretty simple patch to 
> Dovecot. I put the trimming in auth_request_fix_username. I didn't think 
> it warranted a full strfuncs function.
> 
> If there is a better way to do this I'm all ears. I don't really like 
> patching with my own code, even if I did essentially steal if from the 
> kernel's strstrip().

How about this: http://hg.dovecot.org/dovecot-1.1/rev/15ddb7513e2d

Then you can use auth_username_format = %Tu

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