cfg.y: fix warnings introduced in previous commit

(cherry picked from commit 318ff6e6884641f3c9788b01e9ac3d859269be30)

cfg.y

@@ -2725,7 +2725,7 @@ avpflag_oper:
 	| ISAVPFLAGSET { $$ = -1; }
 	;
 cmd:
-	| FORWARD LPAREN RPAREN { $$=mk_action(FORWARD_T, 2, URIHOST_ST, 0, URIPORT_ST, 0); set_cfg_pos($$); }
+	FORWARD LPAREN RPAREN { $$=mk_action(FORWARD_T, 2, URIHOST_ST, 0, URIPORT_ST, 0); set_cfg_pos($$); }
 	| FORWARD LPAREN host RPAREN	{ $$=mk_action(	FORWARD_T, 2, STRING_ST, $3, NUMBER_ST, 0); set_cfg_pos($$); }
 	| FORWARD LPAREN STRING RPAREN	{ $$=mk_action(	FORWARD_T, 2, STRING_ST, $3, NUMBER_ST, 0); set_cfg_pos($$); }
 	| FORWARD LPAREN ip RPAREN	{ $$=mk_action(	FORWARD_T, 2, IP_ST, (void*)$3, NUMBER_ST, 0); set_cfg_pos($$); }