Fix initctl debug toggle regression introduced in ae09272b

Calling `initctl debug` is supposed to toggle Finit debug messages on
the boot console.  This broke in ae09272b when improving support for
running Finit in containers.

Part of this change is a slight refactor of who calles log_init() when
starting up, and when to call ttinit().  We now call ttinit() every time
we toggle debug.

Also, toggling back to normal logging had a bug.  The new default log
level for Finit is LOG_INFO, but toggling back set it to LOG_NOTICE.

Signed-off-by: Joachim Wiberg <troglobit@gmail.com>

src/log.c

@@ -40,6 +40,8 @@ static int loglevel = LOG_INFO;
 
 void log_init(void)
 {
+	ttinit();
+
 	if (debug)
 		loglevel = LOG_DEBUG;
 	else
@@ -72,24 +74,25 @@ static int log_open(void)
 	if (debug)
 		opts |= LOG_PERROR;
 
-	closelog();
 	openlog("finit", opts, LOG_DAEMON);
 	setlogmask(LOG_UPTO(loglevel));
 
 	return up = 1;
 }
 
+static void log_close(void)
+{
+	closelog();
+	up = 0;
+}
+
 /* Toggle debug mode */
 void log_debug(void)
 {
 	debug = !debug;
 
-	if (debug) {
-		loglevel = LOG_DEBUG;
-	} else {
-		loglevel = LOG_NOTICE;
-		ttinit();
-	}
+	log_close();
+	log_init();
 	log_open();
 
 	logit(LOG_NOTICE, "Debug mode %s", debug ? "enabled" : "disabled");