[exim] Exim / Centos / Clam

I want to use CLAM in Exim 4.63/4.72 on Centos 5 & 6.

Would the correct syntax for defining Clam in Exim be:-

    av_scanner = clamd:/var/run/clamd/clamd.pid

or

    av_scanner = 127.0.0.1: 3310: local 

Thank you.


--
Paul.
England,
EU.