Reintroduce netgroups support?

[Jeremy Allison]

On Fri, Jun 03, 2022 at 12:00:16PM +0200, Samuel Cabrero via samba-technical wrote:
>Hi,
>
>I have received some complains after we dropped netgroups support in
>Samba 4.15.0. Our release notes only mention we dropped NIS but
>netgroups went with it.
>
>Some people still use netgroups without NIS, stored in LDAP and made
>available to the system through nss_sss, but it is also possible to use
>/etc/netgroups.
>
>I had a look to the removed code and I think it is possible to
>reintroduce netgroups support independently from NIS, using the
>getdomainname() function from glibc instead of yp_get_default_domain()
>from libnsl.
>
>Should we bring back netgroups support?

If you can do it to help a customer without an extra
support burdon, then go for it !

I will help review the code.

Cheers,

	Jeremy.