bug#41266: Suggested command to import key does not work on debian

[Julien Lepiller]

Hi,

I just installed a debian VM to test changes in the install script and found 
this issue when running the installer script:

First it fails because it cannot find the public key and suggests running:

wget … -q0 - | gpg --import

-q0 does not work with debian's wget, but -O works.

Aftcr importing the key, the script still complains it cannot find it. 
Re-running the same command with "sudo" in front of the gpg import command 
re-imports the key and the script is then able to find it.

My guess is that the first import imported the key in my user's keyring, but 
the script looks in root's keyring. The second attempt added the key to root's 
keyring.