Add ability to specify multiple IP addresses for resolver overrides #1622
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This change adds a
ClientBuilder::resolve_to_addrs
method to accept a slice ofSocketAddr
s for overriding DNS resolution for a single domain. Allowing multiple IPs more accurately reflects behavior ofgetaddrinfo
and allows users to rely on hyper's happy eyeballs algorithm to connect to a host that can accept traffic on IPv4 and IPv6.Builds upon the work in #1277
closes #1621