Fix ordering of UTMP events: reboot, then runlevel

This patch fixes the ordering of UTMP events. The first event that is
expected in /var/run/utmp is reboot, next is the runlevel change to
the configured runlevel, e.g. from S --> 2.

Let the bootmisc plugin handle this, it knows when /var/run/utmp has
been created and is writable.  It is not the eact boot time, but close
enough for most usees.

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

utmp-api.c

@@ -55,6 +55,8 @@ int utmp_set(int type, int pid, char *user, char *line, char *id)
 	ut.ut_tv.tv_sec = time(NULL);
 
 	setutent();
+	while (getutent())
+		;
 	result = pututline(&ut) ? 0 : 1;;
 	endutent();