How to log "TLS name" instead of username

[Alan DeKok]

Mrinal K wrote:
> The statement does not give any output and just gets bypassed in the
> debug output. However if I change the right hand side with a string, it
> gets printed in the debug.
> Is there any problem with accessing variables in my implementation ? 
> 
> Trimmed output from radiusd -X concerning TLS-cert* is as follows, 

  Does the version you have support the TLS-Cert-Serial attributes?  See
raddb/sites-available/default.

  Alan DeKok.