Upstream pointing to COPYING file in headers

[Eriberto Mota <eriberto@debian.org>]

Hi guys,

I would like to confirm a situation. In a package that I will sponsor,
the upstream points to COPYING file in each header. Here is an
example:

---
(C) 2007-2009  Lluís Batlle i Rossell
Please find the license in the provided COPYING file.
---

The provided COPYING file is the conventional full text of the GPL-2.
The upstream homepage[1] says:

Download the latest version (GPLv2+ licensed): ts-0.7.5.tar.gz -
v0.7.5 (2014-03-06) - Changelog

[1] http://vicerveza.homeunix.net/~viric/soft/ts/

However, I can't see any GPL-2+ reference in source code and the
COPYING file has the conventional FSL GPL text (as here[2]).

[2] https://www.gnu.org/licenses/gpl-2.0.html

IMHO, this "generical" case imposes a GPL-2 license, not a GPL-2+,
because the upstream didn't explain his intent in source code.

What is your opinion?

Thanks in advance.

Regards,

Eriberto