feat: embed terasu inside

edgediscovery/allregions/discovery.go

@@ -7,6 +7,7 @@ import (
 	"net"
 	"time"
 
+	"github.com/fumiama/terasu"
 	"github.com/pkg/errors"
 	"github.com/rs/zerolog"
 
@@ -161,7 +162,7 @@ func lookupSRVWithDOT(srvService string, srvProto string, srvName string) (cname
 				return nil, err
 			}
 			tlsConfig := &tls.Config{ServerName: dotServerName}
-			return tls.Client(conn, tlsConfig), nil
+			return tls.Client(terasu.NewConn(conn), tlsConfig), nil
 		},
 	}
 	ctx, cancel := context.WithTimeout(context.Background(), dotTimeout)