[OpenAFS] Ubuntu 20.04 LTS gets kernel 5.11 and ppa:openafs/stable stops working

[Jan Henrik Sylvester]

Hello,

just a quick warning: Ubuntu 20.04 LTS Desktop got kernel 5.11 instead 
of 5.8 today (at least if you do a dist-upgrade). The dkms module from 
ppa:openafs/stable cannot compile with that kernel.

Best wishes,
Jan Henrik