Allow binding on address with arbitrary zone #32
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This patch allows specifying the zone of an IPv6 address when creating a socket, which is useful when the zone ID is already known. Using the interface name as the zone ID may return an outdated value, as the zone ID is cached in https://github.com/golang/go/blob/go1.23.1/src/net/interface.go#L192. This can happen when the interface is renamed and the previous name is assigned to a new network interface.