How do you make /etc/d_passwd

[Bjorn Engsig]

I am very sorry if this has been asked before, (I guess it has), but
would some kind soul please tell me how to use /etc/d_passwd, which
strings shows me that I have compiled in.

My particular interest is for AIX on the RT, but description for any other
system is very welcome.
-- 
Bjorn Engsig, bengsig at oracle.nl, bengsig at oracle.com, mcvax!orcenl!bengsig