[Openswan dev] First pass README update

[Paul Wouters]

On Thu, 14 Oct 2010, David McCullough wrote:

> None of the systems we build have perl or python,  they have all the usual
> shell tools though.
>
> Would a /bin/sh version of the above be acceptable to all ?

Sure, if you want to write them, I have no problem with it. Just passing variables
between subshells using awk is less fun then working with pointers in C :)

In fact, I guess it might be worth doing in C to avoid all the limitations of
the busybox implemented commands?

Paul