attr_filter: remove everything, except the avps1,avp2,..

[A.L.M.Buxey at lboro.ac.uk]

Hi,

> > But, I would like to know if exist some way to do in an inverted match.
> > something
> > like "remove everything, except the avps1,avp2,..."
> 
> That'd be the attr_filter module?

yes. exactly.,  just call a version of the attr_filter  module which contains
your whitelist. everything else is stripped out...thats it job  :-)

alan