change idmap in the same way as passdb

[Andrew Bartlett]

Metze,

Now we have successfully changed the pdb library, I propose we do the
same with idmap.  On a solaris-like system a while back, I found our
internal and private idmap clashing with the system idmap (for NFSv4).
The same grouping library trick should be enough to avoid this issue as
well.  I'll try and prepare a patch tomorrow if I'm not totally swamped
in the rush before Christmas.

Andrew Bartlett

-- 
Andrew Bartlett                       http://samba.org/~abartlet/
Authentication Developer, Samba Team  http://samba.org
Samba Developer, Catalyst IT          http://catalyst.net.nz/services/samba