[CFR] reflect resolv.conf update to running application

[Matthew N. Dodd]

On Tue, 6 Sep 2005, Hajimu UMEMOTO wrote:
> Not only dhclient updates resolv.conf, but ppp, mpd and perhaps others 
> do.  I'm using dhclient and ppp on my laptops.  Sometimes, I use DHCPv6, 
> too.  So, I need such setting for each applications.  It is messy to 
> setup a laptop.

Right, and its simpler if -nothing- modifies resolve.conf.  Hacking libc 
isn't the answer.

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