backwards compatibility with stable

[jeremy@austux.net (Jeremy Lunn)]

I need to implement l2tp in potato so to keep the system nice and neat
I'm going to package it.  But if I'm going to package it then I figure I
might package it for unstable and make it policy compliant and get
someone to sponsor it in.

What measures should I take to make sure my package will build in
potato?  In the past I've had trouble building stuff from
testing/unstable in potato but I've found maintainers to be pretty
helpful when I can't work it out.

Thanks,

-- 
Jeremy Lunn
Melbourne, Australia
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