Instantly quit if it's not possible to read the config file.

go-sendxmpp.go

@@ -208,11 +208,12 @@ func main() {
 		recipients[i] = validatedJid
 	}
 
+	// Read configuration file if user, server or password is not specified.
 	if *flagUser == "" || *flagServer == "" || *flagPassword == "" {
 		// Read configuration from file.
 		config, err := parseConfig(*flagFile)
 		if err != nil {
-			log.Println("Error parsing ", *flagFile, ": ", err)
+			log.Fatal("Error parsing ", *flagFile, ": ", err)
 		}
 		// Set connection options according to config.
 		user = config.username