Improved description of the RH/SRMHostsList option

debian/castor.conf

@@ -89,10 +89,10 @@ FILEQUERY       MAXNBRESPONSES  10000
 #RH PORT 9002
 #RH SEC_PORT 9007
 
-# The RH/SRMHostsList is the list of nodes running a CASTOR SRM service. This allows
-# the SRM service (version 2.8+) to pass through CASTOR the request unique id,
-# only if the machine from which it comes is declared in this list. By default this
-# feature is disabled.
+# The RH/SRMHostsList is the list of nodes (as fully qualified names) running a CASTOR
+# SRM service. SRM is allowed to pass into CASTOR a request UUID only if the machine(s)
+# where SRM runs are declared in this list.
+# It is required to enable this feature in order to run SRM release 2.9-1 and higher.
 #RH SRMHostsList
 
 # In 2.1.9-3 new functionality was added to the request handler to offer the ability