Arnaud Ferraris authored 4 years ago and Emanuele Aina committed 4 years ago

This commit includes suggestions from reviewers and fixes the following
issues:
* use `ref` macros for internal links
* fix minor grammar and spelling issues
* add a warning regarding the preliminary state of Ed25519 support

Signed-off-by: Arnaud Ferraris <arnaud.ferraris@collabora.com>