r13297: It's a good thing the shipment of function headers tridge

r13297: It's a good thing the shipment of function headers tridge
sent me arrived on time... :-).
Refactor this code to make it comprehensible. Tested
against W2K3 SP 1 and W2K SP 4. Test 19 is different
from what I thought. Turns out delete on close on
"open" of a directory (not create) does have an
effect - even if not reported in the flag bit.
trige please test against Vista (my XP box is
refusing to serve at the moment - have to reinstall).

Jeremy.