DOC: Improve inline comments in usersource.ini.template

conf/core/usersources.ini.template

@@ -46,11 +46,14 @@ class = org.caosdb.server.accessControl.Pam
 # scripts or the misc/pam_authentication/ldap_authentication.sh script here.
 ; pam_script = ./misc/pam_authentication/pam_authentication.sh
 default_status = ACTIVE
-# Only users which fulfill these criteria are accepted.
+# Only users which fulfill these criteria are accepted. The values are
+# user/group name(s) separated by whitespaces
 ;include.user = [uncomment and put your users here]
 ;include.group = [uncomment and put your groups here]
 ;exclude.user = [uncomment and put excluded users here]
 ;exclude.group = [uncomment and put excluded groups here]
 
 # It is typically necessary to add at least one admin
-;user.[uncomment a set a username here].roles = administration
+;user.[uncomment and set a username here].roles = administration
+# Several roles are separated by commas
+;user.[uncomment and set a username here].roles = role1, role2, role with spaces