copy the ServerName from the tls.Config to the mint.Config

mint_utils.go

@@ -77,6 +77,7 @@ func tlsToMintConfig(tlsConf *tls.Config, pers protocol.Perspective) (*mint.Conf
 		},
 	}
 	if tlsConf != nil {
+		mconf.ServerName = tlsConf.ServerName
 		mconf.Certificates = make([]*mint.Certificate, len(tlsConf.Certificates))
 		for i, certChain := range tlsConf.Certificates {
 			mconf.Certificates[i] = &mint.Certificate{