Packaging varnish against a jemalloc as a system library

[Ingvar Hagelund]

I recently added the stand-alone jemalloc-2.0.1 to the Fedora/EPEL 
package collection. It is in rawhide, and will reach the stable-updates 
branches after cooking a few weeks in testing-updates.

Following this, I will change my future builds of varnish for Fedora and 
EPEL to use the system library rather than the version that's included.

A simple patch to make trunk do this is here:
http://users.linpro.no/ingvar/varnish/varnish-jemalloc_as_system_library.patch

The upstream specfile does not reflect this yet, and since the patch is 
trivial and can be maintained in Fedora, and I have heard no plans on 
stopping shipping jemalloc in the source, it can stay like this for now.

Ingvar