Make it not fail if it can't find /etc/resolv.conf

On OSX /etc/resolv.conf is generated by the OS anytime the network
changes. If I create a network "By picking 'Create Network...'" from
the wifi menu then there is no /etc/resolv.conf and the throw
that was here would .. uh, .. throw.

Making it not throw makes the dns-server work for my purposes.

I don't know if this is how you like to deal with that or if you'd like some flag or check or OSX only or what but I thought I'd at least pass on what I needed to do to get it to work for me.