Update URLs according to OpenStack document migration
BTW: Do some optimization as well (http -> https)
Change-Id: Ie9cc2c831186cd4dbbde08973032aece20540fc2
- Add licensing headers
- Add definitions for heading markup
- Update rst files to conform to the heading definitions
Change-Id: I75a9b29dbe9b3160cd682defa79ef6a02193de04
Closes-Bug: #1673530