Luke, I am moving the code back into passdb/passdb.c, this the correct

Luke, I am moving the code back into passdb/passdb.c, this the correct
place to do this, not in smbd/passwd.c

Please don't change this without asking first, I have run this past
Andrew so talk to him (I'm on vacation next week).

I also removed the g_newXXX macros. There are essentially a private C extension,
not used anywhere else in the code, and add no functionality over malloc(XX)
and make the code harder to understand (everyone knows what malloc does).

Jeremy.
(This used to be commit e1b1b6fb6794ba02e1fea510a981fa0ce0d12b58)