Add pidfile [1]

While I'm here, don't run the sysctl frob unconditionally, and
s/sysctl/$SYSCTL/

PR:		conf/153460 [1]
Submitted by:	Grigory Rechistov <ggg_mail@inbox.ru>

etc/rc.d/devd

@@ -13,11 +13,17 @@
 name="devd"
 rcvar=`set_rcvar`
 command="/sbin/${name}"
+pidfile=/var/run/${name}.pid
+
+start_precmd=${name}_prestart
+
+devd_prestart ()
+{
+	# If devd is disabled, turn it off in the kernel to avoid memory leaks.
+	if ! checkyesno ${rcvar}; then
+	    $SYSCTL hw.bus.devctl_disable=1
+	fi
+}
 
 load_rc_config $name
 run_rc_command "$1"
-
-# If devd is disabled, turn it off in the kernel to avoid memory leaks.
-if ! checkyesno ${rcvar}; then
-    sysctl hw.bus.devctl_disable=1
-fi