INT 2F - DR DOS 6.0 TaskMAX - NAME TASK                                         
	AX = 2709h
	DX = task index
	DS:SI -> 8-byte name (8 NULs = remove name)
Return: AL = task flags
	    00h ID unused or task terminated
	    01h ID in use, task name table entry valid
	    81h ID in use, task name fixed
	BX = task ID
	ES:DI -> name in task name table (see AX=2701h)
Note:	the task retains the given name until it terminates or the name is
	  removed by specifying a name of 8 NULs.
SeeAlso: AX=2701h,AX=2707h