INT 2F - PC LAN PROG REDIR.SYS internal - SET REDIRIFS ENTRY POINT

	AX = BF80h
	ES:DI -> FAR entry point to IFS handler in REDIRIFS
Return: AL = FFh if installed
	    ES:DI -> internal workspace
Note:	all future IFS calls to REDIR.SYS are passed to the ES:DI entry point
SeeAlso: AX=BF00h