ABOUT

this rc replacement will start all scripts batched: all scripts that have
the same  sequence number in their runlevel will  be started parallel, but
then it will wait for all of them to be finished before continuing with the
next number.

the 'rc' binary generated after 'make' can be used as replacement for
/etc/init.d/rc

The /etc/init.d/rcS has to be modified 
the whole loop

for i in /etc/rcS.d/S??*
..
..
..
done

can be replaced with '/etc/init.d/rc S'

IMPORTANT

this rc replacement uses exec() to start the scripts, and not system(). ALL
SCRIPTS THEREFORE  NEED TO CONTAIN A MAGIC STRING #!/bin/sh (or
equivalent)!!!!!!!!!!

Not all debian scripts have this by  default!!!!!!

TUNING
the more scripts you start with the same sequence number, the more your
speed improvement. I got about 10 seconds  speedup on my laptop.

