feat(buildroot/udhcpc): make default udhcpc script prepend DNS entries #323
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Prioritizes the DNS server retrieved via DHCP over the default/stock ones (and make them a fallback). This was heavily inspired by
/usr/share/udhcpc/default.script.A big drawback is that
resolv.confhat diplicated blocks at the beginning and the end. I did not see an obvious solution to that.