disable utp on fallback dialer

.gx/lastpubver

@@ -1 +1 @@
-1.2.0: Qme5FbqN4BteaBcpbsj51fjzvqJhr54DigbqWAdXS5zgEe
+1.3.0: QmaNko8ug5seuo61TnmW8jcVtCVgD6uR454wagU7PPKVWA

fallback.go

@@ -14,16 +14,13 @@ type FallbackDialer struct {
 }
 
 func (fbd *FallbackDialer) Matches(a ma.Multiaddr) bool {
-	return mafmt.TCP.Matches(a) || mafmt.UTP.Matches(a)
+	return mafmt.TCP.Matches(a)
 }
 
 func (fbd *FallbackDialer) Dial(a ma.Multiaddr) (Conn, error) {
 	if mafmt.TCP.Matches(a) {
 		return fbd.tcpDial(a)
 	}
-	if mafmt.UTP.Matches(a) {
-		return fbd.utpDial(a)
-	}
 	return nil, fmt.Errorf("cannot dial %s with fallback dialer", a)
 }
 
@@ -41,6 +38,8 @@ func (fbd *FallbackDialer) tcpDial(raddr ma.Multiaddr) (Conn, error) {
 	}, nil
 }
 
+// NOTE: this code is currently not in use. utp is not stable enough for prolonged
+// use on the network, and causes random stalls in the stack.
 func (fbd *FallbackDialer) utpDial(raddr ma.Multiaddr) (Conn, error) {
 	_, addr, err := manet.DialArgs(raddr)
 	if err != nil {

package.json

@@ -48,5 +48,5 @@
   "language": "go",
   "license": "MIT",
   "name": "go-libp2p-transport",
-  "version": "1.2.0"
+  "version": "1.3.0"
 }