RE: content_file pipe args question

[Gary Smith]

>    ... ${sasl_username:unknown} ${recipient}
> 
> ie. if $sasl_username is empty, substitute "unknown"
> 
> But nothing particularly wrong with what you're doing already.

That will work better for me since I won't have to parse out the sasl_username 
from the [] if it's empty.  I can just check for the unknown value.  

Thanks