directory mode + force directory mode = ???

[Edward Schernau]

Can anyone give a brief, english synopsis of how this
works?   I must be missing something obvious, or maybe
there IS a need to have 2 similarly labelled config options.
Or maybe I'm lost in the goldbergian method that this applies
permissions (take the real perms, bitwise OR them with the
mask, then apply all the permissions NOT given, etc. etc.)

Help a dummy?
-- 
Edward Schernau			http://www.schernau.com
Network Architect		mailto:ed at schernau.com
Rational Computing		Providence, RI, USA