Plain http

[johrstrom]

Modify this link to include the branch name, and possibly the page this PR modifies:

https://osc.github.io/ood-documentation-test/plain-http/

This PR does 2 things

• re-orders the instructions on the install page for a little more clarity
• removes the warning around https traffic as it no longer applies.

[Oglopf]

LGTM.