Add a sync to the shutdown step. In the common case this will be harmless

at worst. On a heavily loaded server it will give the fs a chance to do
its business without the axe hanging over its head.

Submitted by:	ivoras

etc/rc.d/mountcritlocal

@@ -5,13 +5,13 @@
 
 # PROVIDE: mountcritlocal
 # REQUIRE: root hostid_save mdconfig
-# KEYWORD: nojail
+# KEYWORD: nojail shutdown
 
 . /etc/rc.subr
 
 name="mountcritlocal"
 start_cmd="mountcritlocal_start"
-stop_cmd=":"
+stop_cmd=sync
 
 mountcritlocal_start()
 {