* eval.c (evaluate_subexp): Add case MULTI_SUBSCRIPT.

	* eval.c (evaluate_subexp):  Add case MULTI_SUBSCRIPT.
	* expprint.c (print_subexp):  Rename BINOP_MULTI_SUBSCRIPT to
	MULTI_SUBSCRIPT.
	* expprint.c (dump_expression):  New function for dumping
	expression vectors during gdb debugging.
	* expression.h (BINOP_MULTI_SUBSCRIPT):  Name changed to
	MULTI_SUBSCRIPT and moved out of BINOP range.
	* expression.h (DUMP_EXPRESSION):  New macro that calls
	dump_expression if DEBUG_EXPRESSIONS is defined.
	* m2-exp.y (BINOP_MULTI_SUBSCRIPT):  Changed to MULTI_SUBSCRIPT.
	* parse.c (length_of_subexp, prefixify_subexp):  Change
	BINOP_MULTI_SUBSCRIPT to MULTI_SUBSCRIPT.
	* parse.c (parse_exp_1):  Call DUMP_EXPRESSION before and after
	prefixify'ing the expression.
	* printcmd.c (print_command_1):  Add comment.
	**** start-sanitize-chill ****
	* ch-exp.y (expression_list):  Add useful actions.
	* ch-exp.y (value_array_element):  Add useful actions.
	* ch-exp.y (array_primitive_value):  Add production.
	* ch-exp.y (yylex):  Recognize ',' as a token.
	**** end-sanitize-chill ****