[pkg-gnupg-maint] Bug#888025: gpgsm: UI asks insane, unanswerable trust questions

[chris]

Dear maintainer,

I've recently started to re-experience that bug (#888025), probably because 
someone is sending me emails using some "certificate".

It is in the form of a popups when Kmail is opened in the background. Those 
popups come randomly without user action.

I understand it would be useless to answer yes to the popup. Additionally, it 
doesn't seem legit/safe at all, for someone who doesn't have the necessary 
knowledge, to answer yes to "do you ultimately trust XXX to correctly certify 
user certificates?"

I've read the explanations/comments in the bug, but I didn't understand 
anything, sorry.

The certificate in the popup is the same as this one:

```
$ awk -v cmd='openssl x509 -noout -subject' '/BEGIN/{close(cmd)};{print | 
cmd}' < /etc/ssl/certs/ca-certificates.crt | grep 'Manchester.*AAA'
subject=C = GB, ST = Greater Manchester, L = Salford, O = Comodo CA Limited, 
CN = AAA Certificate Services
```

I've been told to try: `sudo dpkg-reconfigure ca-certificates`, but that didn't 
change anything.

It won't crash the system, but it's very very annoying/disruptive for the 
user.

Thanks,
Chris