Merge #1600

1600: Force setup-file download scheme to HTTPS r=mergify[bot] a=Nebukadneza



## What type of PR?

bug-fix

## What does this PR do?
Up until now HTTPS was only offered by redirect, making MitM possible
before server redirect hit the client.
Add scheme-force to HTTPS to the url-generation.

### Related issue(s)
- fixes #963 

## Prerequistes
- [x] In case of feature or enhancement: documentation updated accordingly
- [x] Unless it's docs or a minor change: add [changelog](https://mailu.io/master/contributors/guide.html#changelog) entry file.


Co-authored-by: Dario Ernst <dario.ernst@rommelag.com>

setup/flavors/compose/setup.html

@@ -11,8 +11,8 @@ in a project directory. First create your project directory.</p>
 to read and check the configuration variables generated by the wizard.</p>
 
 <pre><code>cd {{ root }}
-wget {{ url_for('.file', uid=uid, filepath='docker-compose.yml', _external=True) }}
-wget {{ url_for('.file', uid=uid, filepath='mailu.env', _external=True) }}
+wget {{ url_for('.file', uid=uid, _scheme='https', filepath='docker-compose.yml', _external=True) }}
+wget {{ url_for('.file', uid=uid, _scheme='https', filepath='mailu.env', _external=True) }}
 </pre></code>
 {% endcall %}
 

setup/flavors/stack/setup.html

@@ -11,8 +11,8 @@ in a project directory. First create your project directory.</p>
 to read and check the configuration variables generated by the wizard.</p>
 
 <pre><code>cd {{ root }}
-wget {{ url_for('.file', uid=uid, filepath='docker-compose.yml', _external=True) }}
-wget {{ url_for('.file', uid=uid, filepath='mailu.env', _external=True) }}
+wget {{ url_for('.file', uid=uid, _scheme='https', filepath='docker-compose.yml', _external=True) }}
+wget {{ url_for('.file', uid=uid, _scheme='https', filepath='mailu.env', _external=True) }}
 </pre></code>
 {% endcall %}