pkg update fails with: rsa verify failed: error:04091077:rsa routines:INT_RSA_VERIFY:wrong signature length

[Dave Cottlehuber]

I'm seeing this this morning on both 12.0-CURRENT systems
(running drm-next kernel), and I see 1 other report on IRC. As
presumably this will be fixed in due course, this is a heads up
to let other people searching that they are not alone in their
misery.
 
```
# pkg update
Updating FreeBSD repository catalogue...
Fetching meta.txz: 100%    944 B   0.9kB/s    00:01    
Fetching packagesite.txz: 100%    6 MiB   1.2MB/s    00:05    
pkg: rsa verify failed: error:04091077:rsa routines:INT_RSA_VERIFY:wrong
signature length
pkg: No trusted certificate has been used to sign the repository
Unable to update repository FreeBSD
```

A+
Dave