INT 21 - Novell NetWare - CONNECTION SERVICES - SYSTEM LOGOUT                   
	AH = D7h
Return: AL = error code
Desc:	this function closes the caller's open files, logs it out from all
	  file servers, detaches the workstation from all non-default file
	  servers, and maps a drive to the default server's SYS:LOGIN directory
Note:	this function is supported by NetWare 4.0+, Advanced NetWare 1.0+, and
	  Alloy NTNX
SeeAlso: AH=D6h,AH=E3h/SF=14h,AH=F1h"NetWare"