INT 2A U - Novell NetWare Lite - CLIENT - END SERVER CRITICAL SECTION           
	AX = D851h
Return: nothing
Desc:	resets an internal byte-sized counter to zero
Note:	this function is intercepted by DV/X 1.10 PEERSERV.DVR and the
	  Advanced NetWare 4.0 DOS Requester
SeeAlso: AX=D850h