File transfer via http_upload not possible via unsecured http

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Versions

• OS: arch linux
• Gajim version: 1.0.3.
• GTK version: 3.22.30
• Python-nbxmpp version: 0.6.6

Steps to reproduce the problem

1. try to transfer file with http_upload

Expected behavior

File is being transferred

Actual behavior

message box title "Unsicher" content "Der Server schlägt einen ungesicherten Transportweg ohne Transportverschlüsselung vor (http)"

nothing is transferred