Format of IFS driver list:
Offset	Size	Description	)
 00h	DWORD	pointer to next driver header
 04h  8 BYTEs	IFS driver name (blank padded), as used by FILESYS command
 0Ch  4 BYTEs	???
 10h	DWORD	pointer to IFS utility function entry point (see #01658)
		call with ES:BX -> IFS request (see #01660)
 14h	WORD	offset in header's segment of driver entry point
	???
SeeAlso: #01658,#01660