Upstream now seems to ignore the 2.1 version number in configure.in,
and only use YEAR-based versions.

When packaging a new version for Debian:

Download pristine archive and repackage it without generated files.
# (cd DIR && uscan --repack --compression xz)

 -- Nicolas Boulenguez <nicolas@debian.org>, Mon, 28 Sep 2015 08:35:02 +0200
