[Dune] Dune 2.7.1-rc1 ready for testing

[Christoph Grüninger]

To whom it may concern,

I just wrapped up the first release candidate for the upcoming 2.7.1
release. You can download the tarballs

https://dune-project.org/download/2.7.1rc1/dune-common-2.7.1-rc1.tar.gz
https://dune-project.org/download/2.7.1rc1/dune-geometry-2.7.1-rc1.tar.gz
https://dune-project.org/download/2.7.1rc1/dune-grid-2.7.1-rc1.tar.gz
https://dune-project.org/download/2.7.1rc1/dune-istl-2.7.1-rc1.tar.gz
https://dune-project.org/download/2.7.1rc1/dune-localfunctions-2.7.1-rc1.tar.gz
https://dune-project.org/download/2.7.1rc1/dune-grid-howto-2.7.1-rc1.tar.gz
https://dune-project.org/download/2.7.1rc1/dune-typetree-2.7.1-rc1.tar.gz
https://dune-project.org/download/2.7.1rc1/dune-functions-2.7.1-rc1.tar.gz
https://dune-project.org/download/2.7.1rc1/dune-uggrid-2.7.1-rc1.tar.gz

or checkout the `v2.7.1rc1` tag via Git.

With the Dune core modules, the staging modules dune-uggrid,
dune-typetree, and dune-functions are released.

Please go and test, and report any problems that you encounter (via
issue tracker, mailing list, or personal email).

I tested
- all mentioned modules
- with dune-alugrid 2.7 branch
- upcoming DuMuX 3.3
- Clang 11 and GCC 10
- CMake 3.18 and 3.19-rc1

I did not test
- dune-FEM, dune-PDELab or other appliation modules
- Alberta
- other plattforms then openSuse 15.2 on x86

Known issues:

* The module version for most modules is still 2.7.0.
* No fix for mpi gather scatter yet back-ported (dune-common !885)

Bye
Christoph

-- 
Als wär es nix, leb' ich von [IT] und mach' nur, was ich lieb'
Lebe wie im Paradies, womit hab' ich das verdient?
Die Wahrheit ist: Hab' ich nicht, ich bin nur reicher beschenkt
Als jemand in einem armen Land mit dem gleichen Talent
[frei nach Tua von Die Orsons - Oioioiropa]