board/system: add support for an optional /etc/rc.local

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

Author: troglobit

board/system/rootfs/etc/inittab

@@ -1,40 +1,20 @@
-# /etc/inittab
 #
-# Copyright (C) 2001 Erik Andersen <andersen@codepoet.org>
+# Format for each entry: <id>:<runlevels>:<action>:<process>
 #
-# Note: BusyBox init doesn't support runlevels.  The runlevels field is
-# completely ignored by BusyBox init. If you want runlevels, use
-# sysvinit.
+# id        : tty to run on, or empty for /dev/console
+# runlevels : ignored
+# action    : one of sysinit, respawn, askfirst, wait, and once
+# process   : program to run
 #
-# Format for each entry: <id>:<runlevels>:<action>:<process>
+# Note: BusyBox init doesn't support runlevels.
+#       The field is completely ignored.
 #
-# id        == tty to run on, or empty for /dev/console
-# runlevels == ignored
-# action    == one of sysinit, respawn, askfirst, wait, and once
-# process   == program to run
 
-# Startup the system
-#::sysinit:/bin/mount -t proc proc /proc
-#::sysinit:/bin/mount -o remount,rw /
-#::sysinit:/bin/mkdir -p /dev/pts /dev/shm
-#::sysinit:/bin/mount -a
-#::sysinit:/bin/mkdir -p /run/lock/subsys
-#::sysinit:/sbin/swapon -a
-#null::sysinit:/bin/ln -sf /proc/self/fd /dev/fd
-#null::sysinit:/bin/ln -sf /proc/self/fd/0 /dev/stdin
-#null::sysinit:/bin/ln -sf /proc/self/fd/1 /dev/stdout
-#null::sysinit:/bin/ln -sf /proc/self/fd/2 /dev/stderr
-#::sysinit:/bin/hostname -F /etc/hostname
-# now run any rc scripts
+# Start container system
 ::sysinit:/etc/init.d/rcS
 
-# Put a getty on the serial port
-#console::respawn:/sbin/getty -L  console 0 vt100 # GENERIC_SERIAL
-
-# Stuff to do for the 3-finger salute
-#::ctrlaltdel:/sbin/reboot
+# finish by calling rc.local, if it exists and is executable
+::sysinit:/etc/rc.local
 
 # Stuff to do before rebooting
 ::shutdown:/etc/init.d/rcK
-#::shutdown:/sbin/swapoff -a
-#::shutdown:/bin/umount -a -r