New miekg/dns to fix a resource leak (not affecting us)

vendor/github.com/miekg/dns/README.md

@@ -72,6 +72,7 @@ A not-so-up-to-date-list-that-may-be-actually-current:
 * https://github.com/Luzilla/dnsbl_exporter
 * https://github.com/bodgit/tsig
 * https://github.com/v2fly/v2ray-core (test only)
+* https://kuma.io/
 
 
 Send pull request if you want to be listed here.

vendor/github.com/miekg/dns/server.go

@@ -321,6 +321,7 @@ func (srv *Server) ListenAndServe() error {
 		}
 		u := l.(*net.UDPConn)
 		if e := setUDPSocketOptions(u); e != nil {
+			u.Close()
 			return e
 		}
 		srv.PacketConn = l

vendor/github.com/miekg/dns/version.go

@@ -3,7 +3,7 @@ package dns
 import "fmt"
 
 // Version is current version of this library.
-var Version = v{1, 1, 39}
+var Version = v{1, 1, 40}
 
 // v holds the version of this library.
 type v struct {