gethostbyname() and resolv.conf updates

[Colin Walters]

On Sat, Jun 19, 2010 at 10:54 PM, Dan Williams <dcbw at redhat.com> wrote:
>
> I'm just gonna make NM use a local caching nameserver (which means
> dnsmasq) by default at some point soon.  People that don't want it can
> turn it off.

When thinking about this, there's a rather obvious patch here that
really should have been made 5+ years ago...make it an option!  And
this actually makes some sense, e.g. if NetworkManager writes out a
static configuration, then there's no need to stat() on it since we
can assume it won't change.  (This does still screw over server admins
who hand-edit it, but...)

glibc and NetworkManager patches attached.

(I'm totally in favor of the dnsmasq approach too since the OS
desperately needs DNS caching too, but this is a simple patch that
doesn't conceptually conflict).
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