Martin Lueders requested to merge update_libxc6 into main Nov 21, 2023

Description

Update the functionals list, and adapt a test, which was using a functional (mgga_c_revscan) which was broken in libxc pre 6.1.0

News snippet

Update for libxc6 support

Checklist

I have checked that my code follows the Octopus coding standards
I have added tests for all the new features added in this request.