Correct comment

Author: ndptech

src/tests/modules/crl/all.unlang

@@ -38,7 +38,7 @@ clientno := 1
 read_cert_serial
 
 session-state.TLS-Certificate.Serial := %bin(serial)
-# This is a dummy URI - the module is configured to just cat the crl using %exec()
+# This is a dummy URI - the module is configured to just read the file using %file.cat()
 session-state.TLS-Certificate.X509v3-CRL-Distribution-Points = 'http://www.example.com/example_ca.crl'
 
 crl