This allows us to produce releases that are roughly a third in
size, have no limitation on path length, and are still readable
by all supported platforms.
---
Changes from [v1]:
* Update all references to .tar.gz, including spec files,
scripts and documentation (thanks Dan)
* Fix typo lenght -> length (thanks Ján)
[v1]
https://www.redhat.com/archives/libvir-list/2016-June/msg00974.html