plugins: skip plugin in rescue mode

These plugins should not run in rescue mode, because the system may be
in a very bad state and we do not want to make the situation any worse
than it already is.

Essentially, only services in rescue.conf should run in rescue mode.

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

plugins/rtc.c

@@ -84,6 +84,11 @@ static void rtc_save(void *arg)
 	int fd, rc = 0;
 	char tz[128];
 
+	if (rescue) {
+		_d("Skipping %s plugin in rescue mode.", __FILE__);
+		return;
+	}
+
 	fd = rtc_open();
 	if (fd < 0)
 		return;
@@ -121,6 +126,11 @@ static void rtc_restore(void *arg)
 	int fd, rc = 0;
 	char tz[128];
 
+	if (rescue) {
+		_d("Skipping %s plugin in rescue mode.", __FILE__);
+		return;
+	}
+
 	fd = rtc_open();
 	if (fd < 0)
 		return;