Toggle silent mode (progress) when toggling debug mode

Starting in debug mode and disabling debug at runtime did not exhibit
the same behavior as if starting in normal mode and toggling debug mode
at runtime.  This patch adds toggling of silent mode (progress output)
to runtime debug toggling.

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

src/log.c

@@ -122,6 +122,9 @@ void log_debug(void)
 	}
 	log_open();
 
+	/* Also toggle silent mode (progress) */
+	log_silent();
+
 	logit(LOG_NOTICE, "Debug mode %s", debug ? "enabled" : "disabled");
 }