MSC: unsigned _dos_setdate( struct dosdate_t *date )

	- prototype in dos.h

	- date = receives date information
	- returns 0 on success or DOS error code on failure
	- sets DOS date via INT 21,2B
	- DOS 3.3+ also sets CMOS clock

	- MS C uses _dos_setdate()
	- see INT 21,2B   _dos_getdate()