(print_string): Now static.

(print_string): Now static.
(print): When multibyte is disabled,
print multibyte string chars using hex escapes.

(printchar): Pass new arg to message_dolog.
(strout): New arg MULTIBYTE.  Callers changed.

(strout): Take args SIZE and SIZE_BYTE;
operate on both chars and bytes.
(print_string): Pass new arg to strout.
If not using strout, fetch a whole multibyte char at once.
(write_string): Pass new arg to strout.
(write_string_1): Likewise.
(print) <case Lisp_String>: Scan by chars and bytes.
(print) <case Lisp_Symbol>: Scan name by chars and bytes.

(PRINTPREPARE): Use make_multibyte_string.
Initialize print_buffer_pos_byte.  Use insert_1_both.
(printchar): Update print_buffer_pos_byte and print_buffer_pos.
(print_buffer_pos_byte): New variable.