INT 21 - Novell NetWare - FILE SERVICES - EXTENDED FILE ATTRIBUTES
        AH = B6h
        AL = subfunction
            00h get extended file attributes
            01h set extended file attributes
                CL = extended file attributes (see below)
        DS:DX -> ASCIZ pathname (max 255 bytes)
Return: CF set on error
            AL = error code
                8Ch caller lacks privileges
                FEh not permitted to search directory
                FFh file not found
        CF clear if successful
            AL = 00h (success)
            CL = current extended file attributes (see below)
Note:   this function is supported by Advanced NetWare 2.1+
SeeAlso: AH=E3h/SF=0Fh

Bitmask of extended file attributes:
 bits 2-0: search mode (executables only)
        000 none (use shell's default search)
        001 search on all opens without path
        010 do not search
        011 search on read-only opens without path
        100 reserved
        101 search on all opens
        110 reserved
        111 search on all read-only opens
 bit 3: reserved
 bit 4: transactions on file tracked
 bit 5: file's FAT indexed
 bit 6: read audit (to be implemented)
 bit 7: write audit (to be implemented)