[BUG report] Proxy cache error 404 on valid URL

Hello,

Just to say that i found an issue in the proxy. It report a 404 error with a valid URL. It’s seem the “+” sign is not correctly passed :

Original URL :
http://fr.archive.ubuntu.com/ubuntu/pool/main/t/thunderbird/thunderbird_68.7.0**+**build1-0ubuntu0.18.04.1_i386.deb

Wrong URL from the Yacy 404 error message :
http://fr.archive.ubuntu.com/ubuntu/pool/main/t/thunderbird/thunderbird_68.7.0**%20**build1-0ubuntu0.18.04.1_i386.deb

In ASCII code, the “+” sign is %2B and note %20