all: Simplify some method calls (#7499)

strings.Replace(a, b, c, -1) -> strings.ReplaceAll(a, b, c)

(Go 1.12) and who knows what was up with that dialQueue.Sort() thing.

cmd/stvanity/main.go

@@ -37,7 +37,7 @@ type result struct {
 
 func main() {
 	flag.Parse()
-	prefix := strings.ToUpper(strings.Replace(flag.Arg(0), "-", "", -1))
+	prefix := strings.ToUpper(strings.ReplaceAll(flag.Arg(0), "-", ""))
 	if len(prefix) > 7 {
 		prefix = prefix[:7] + "-" + prefix[7:]
 	}