-n [master]

[rt27912]
    Add code to suppor on {commit expiry release} statements for DHCPv6.
    There are several pieces to this change
    1) Add space in the iasubopt structure to hold the statement pointers
    2) Update the execute code to fill in the structures as necessary
    3) Execute the statements when appropriate
    Many of the changes in the non-v6 code are to pass the v6 structures
    around to the execute code.

server/dhcpd.c

@@ -883,14 +883,9 @@ void postconf_initialization (int quiet)
 	/* Now try to get the lease file name. */
 	option_state_allocate (&options, MDL);
 
-	execute_statements_in_scope ((struct binding_value **)0,
-				     (struct packet *)0,
-				     (struct lease *)0,
-				     (struct client_state *)0,
-				     (struct option_state *)0,
-				     options, &global_scope,
-				     root_group,
-				     (struct group *)0);
+	execute_statements_in_scope(NULL, NULL, NULL, NULL, NULL,
+				    options, &global_scope, root_group,
+				    NULL, NULL);
 	memset (&db, 0, sizeof db);
 	oc = lookup_option (&server_universe, options, SV_LEASE_FILE_NAME);
 	if (oc &&