Sockopt: Handle single-family interface binding on Windows, including TUN inbound's autoOutboundsInterface (#7214)

And https://github.com/XTLS/Xray-core/pull/7214#issuecomment-6329118637

https://github.com/XTLS/Xray-core/pull/7201#issuecomment-6314453444

Fixes https://github.com/XTLS/Xray-core/issues/7160#issuecomment-6246944012

---------

Co-authored-by: patterniha <71074308+patterniha@users.noreply.github.com>

features/dns/localdns/client.go

@@ -2,6 +2,7 @@ package localdns
 
 import (
 	"context"
+	"net/netip"
 	"syscall"
 	"time"
 
@@ -100,6 +101,15 @@ func New() *Client {
 			if internet.IsSkippedDNSServer(address) {
 				return nil, errors.New("skipped DNS server ", address)
 			}
+			// A socket of the server's IP version only needs that version bound
+			// to the interface, which a dual-stack one would need both of.
+			if ap, err := netip.ParseAddrPort(address); err == nil && (network == "udp" || network == "tcp") {
+				if ap.Addr().Unmap().Is4() {
+					network += "4"
+				} else {
+					network += "6"
+				}
+			}
 			return d.DialContext(ctx, network, address)
 		},
 	}