Improve source query diagnostics

cmd/gamestatus/main.go

@@ -29,6 +29,7 @@ func main() {
 	}
 
 	client := gamestatus.NewAll(cfg.timeout)
+	client.SetSourceDebug(cfg.debug)
 
 	info, err := connect(client, cfg.edition, host, port, cfg.useQuery)
 	if err != nil {
@@ -54,6 +55,7 @@ type cliConfig struct {
 	useQuery bool
 	pretty   bool
 	motdRaw  bool
+	debug    bool
 }
 
 func parseCLI(args []string) (cliConfig, string, error) {
@@ -70,6 +72,7 @@ func parseCLI(args []string) (cliConfig, string, error) {
 	useQuery := fs.Bool("query", false, "use full query when supported")
 	pretty := fs.Bool("pretty", false, "use compact human-friendly output")
 	motdRaw := fs.Bool("motd-raw", false, "print raw MOTD without cleanup")
+	debug := fs.Bool("debug", false, "print protocol-specific diagnostics")
 
 	if len(args) > 0 {
 		switch strings.ToLower(strings.TrimSpace(args[0])) {
@@ -96,6 +99,7 @@ func parseCLI(args []string) (cliConfig, string, error) {
 	cfg.useQuery = *useQuery
 	cfg.pretty = *pretty
 	cfg.motdRaw = *motdRaw
+	cfg.debug = *debug
 
 	if fs.NArg() != 1 {
 		return cfg, "", nil
@@ -126,6 +130,8 @@ func printUsage() {
 	fmt.Fprintln(os.Stderr, "        use compact human-friendly output")
 	fmt.Fprintln(os.Stderr, "  -motd-raw")
 	fmt.Fprintln(os.Stderr, "        print raw MOTD without cleanup")
+	fmt.Fprintln(os.Stderr, "  -debug")
+	fmt.Fprintln(os.Stderr, "        print protocol-specific diagnostics")
 }
 
 func connect(client *gamestatus.Client, edition, host string, port int, useQuery bool) (*gamestatus.ServerInfo, error) {