squid3 lenny backport has no null storage option

[Jason Giglio <jgiglio@gigstaggart.com>]

I can't seem to get the null storage option to work in the squid3 backport.

Here is the line from the official version:

--enable-storeio="ufs,aufs,coss,diskd,null"

I suspect that the backport was built without null turned on.