fix tracing forever if tracing the root

Signed-off-by: Sam Therapy <sam@samtherapy.net>

.vscode/launch.json

@@ -1,16 +0,0 @@
-{
-	// Use IntelliSense to learn about possible attributes.
-	// Hover to view descriptions of existing attributes.
-	// For more information, visit: https://go.microsoft.com/fwlink/?linkid=830387
-	"version": "0.2.0",
-	"configurations": [
-		{
-			"name": "Launch Package",
-			"type": "go",
-			"request": "launch",
-			"mode": "auto",
-			"args": ["froth.zone", "+trace", "@1.1.1.1"],
-			"program": "${workspaceFolder}/main.go"
-		}
-	]
-}

main.go

@@ -62,7 +62,7 @@ func run(args []string) (opts *util.Options, code int, err error) {
 		for i := 0; i <= opts.Request.Retries; i++ {
 			resp, err = query.CreateQuery(opts)
 			if err == nil {
-				keepTracing = opts.Trace && (!resp.DNS.Authoritative || opts.Request.Name == ".")
+				keepTracing = opts.Trace && (!resp.DNS.Authoritative || (opts.Request.Name == "." && tempDomain != "."))
 
 				break
 			} else if i != opts.Request.Retries {