Status: sindastra.de is pending submission to the preload list.
What this means is that once it is included, your browser will know to access sindastra.de through HTTPS with valid certificate only! No exceptions!
This is for your security. This also means there will be no HTTP to HTTPS redirect that could get manipulated in between. And even if there was, your browser would not accept anything less than a valid certificate on HTTPS.
Want to secure your own site? Just make sure you have HSTS enabled as seen in a previous post of mine, and then head to https://hstspreload.org to submit your site for inclusion!
You can check the status of the sindastra.de submission here: https://hstspreload.org/?domain=sindastra.de