Story ac2 rework. Added comments.

projects/cadcAccessControl-Server/src/ca/nrc/cadc/ac/server/ldap/LdapUserDAO.java

@@ -770,7 +770,8 @@ public class LdapUserDAO<T extends Principal> extends LdapDAO
     }
 
     /**
-     * Check whether the user is a member of the group.
+     * Check whether the user is a member of the group. This method is created
+     * to provide optimization for the LDAP server.
      *
      * @param userID  The userID.
      * @param groupID The groupID.

projects/cadcAccessControl-Server/src/ca/nrc/cadc/ac/server/ldap/LdapUserPersistence.java

@@ -351,7 +351,8 @@ public class LdapUserPersistence<T extends Principal>
     }
     
     /**
-     * Check whether the user is a member of the group.
+     * Check whether the user is a member of the group. This method is created
+     * to provide optimization for the LDAP server.
      *
      * @param userID The userID.
      * @param groupID The groupID.