fix(stuninput): sync with tor-browser-build

See ooni/probe#2417 (comment)

internal/stuninput/stuninput.go

@@ -9,23 +9,24 @@ import (
 
 // TODO(bassosimone): we need to keep this list in sync with
 // the list internally used by TPO's snowflake.
-var inputs = []string{
-	"stun.voip.blackberry.com:3478",
-	"stun.antisip.com:3478",
-	"stun.bluesip.net:3478",
-	"stun.dus.net:3478",
-	"stun.epygi.com:3478",
-	"stun.sonetel.com:3478",
-	"stun.sonetel.net:3478",
-	"stun.uls.co.za:3478",
-	"stun.voipgate.com:3478",
-	"stun.voys.nl:3478",
+//
+// We should sync with https://gitlab.torproject.org/tpo/applications/tor-browser-build/-/blob/main/projects/common/bridges_list.snowflake.txt
+var inputs = map[string]bool{
+	"stun.l.google.com:19302": true,
+	"stun.antisip.com:3478":   true,
+	"stun.bluesip.net:3478":   true,
+	"stun.dus.net:3478":       true,
+	"stun.epygi.com:3478":     true,
+	"stun.sonetel.com:3478":   true,
+	"stun.uls.co.za:3478":     true,
+	"stun.voipgate.com:3478":  true,
+	"stun.voys.nl:3478":       true,
 }
 
 // AsSnowflakeInput formats the input in the format
 // that is expected by snowflake.
 func AsSnowflakeInput() (output []string) {
-	for _, input := range inputs {
+	for input := range inputs {
 		output = append(output, fmt.Sprintf("stun:%s", input))
 	}
 	return
@@ -34,7 +35,7 @@ func AsSnowflakeInput() (output []string) {
 // AsnStunReachabilityInput formats the input in
 // the format that is expected by stunreachability.
 func AsnStunReachabilityInput() (output []string) {
-	for _, input := range inputs {
+	for input := range inputs {
 		serio := (&url.URL{Scheme: "stun", Host: input})
 		output = append(output, serio.String())
 	}