libproxy addition to comps for F-13

[Bill Nottingham]

Matthias Clasen (mclasen at redhat.com) said: 
> > So the other question is : Is there any problem in adding this change
> > to comps for F-13 ?
> > https://fedorahosted.org/rel-eng/attachment/ticket/3565/adds-libproxy2comps.patch
> > 
> > As a record, on a default install and without this change: libproxy is
> > pointless. 
> > But If one want to use libproxy, he will have to figure out which
> > packages to install manually. This patch assume a reasonable default,
> > so having libproxy installed just make sense.
> 
> 
> I'm in favor of this change. 

Looks reasonable to me.

Bill