WKD proper behavior on fetch error

[Neal H. Walfield]

Hi Stefan,

On Sun, 17 Jan 2021 19:41:44 +0100,
Stefan Claas via Gnupg-users wrote:
> Please try to accept that GitHub (and maybe in the future others as well)
> has *no* bad certificate!

As others have tried to explain: the certificate that github uses for
sub.sub.github.com is invalid for sub.sub.github.com; that certificate
is only valid for sub.github.com and github.com.

:) Neal