broker: initialize cmdline defaults
Explicitly initialize all main_arg_* variables to clearly make the
defaults visible.
#include "main.h"
#include "manager.h"
-int main_arg_controller;
-bool main_arg_verbose;
+int main_arg_controller = 3;
+bool main_arg_verbose = false;
static void help(void) {
printf("%s [GLOBALS...] ...\n\n"
