init/FreeBSD: remove xendriverdomain_precmd

...because it's empty. While there also rename xendriverdomain_startcmd to
xendriverdomain_start in order to match the nomenclature of the file.

Signed-off-by: Roger Pau Monné <roger.pau@citrix.com>
Acked-by: Wei Liu <wei.liu2@citrix.com>
[ wei: fix up minor error ]
Signed-off-by: Wei Liu <wei.liu2@citrix.com>

(cherry picked from commit 29b968e46b)
(cherry picked from commit 86e54bea2b)
(cherry picked from commit 57a037ec287cd6069c6e38df247d6316e00cb9db)

tools/hotplug/FreeBSD/rc.d/xendriverdomain.in

@@ -13,19 +13,13 @@ LD_LIBRARY_PATH="${libdir}"
 export LD_LIBRARY_PATH
 
 name="xendriverdomain"
-start_precmd="xendriverdomain_precmd"
-start_cmd="xendriverdomain_startcmd"
+start_cmd="xendriverdomain_start"
 stop_cmd="xendriverdomain_stop"
 extra_commands=""
 
 XLDEVD_PIDFILE="/var/run/xldevd.pid"
 
-xendriverdomain_precmd()
-{
-	:
-}
-
-xendriverdomain_startcmd()
+xendriverdomain_start()
 {
 	printf "Starting xenservices: xl devd."