resolv: fix IPv6 resolution on Darwin
res_sockaddr_union() has a field for IPv4 and a field for IPv6. When we
used &servers[i].sin.sin_addr, it does not return the right address
for IPv6.
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res_sockaddr_union() has a field for IPv4 and a field for IPv6. When we
used &servers[i].sin.sin_addr, it does not return the right address
for IPv6.