Puma recipes are not documented to show to which versions apply

[dvalfre]

When it comes to versions of Puma:

• Recipe puma applies to versions above 5.1.
• Recipe puma_legacy applies to versions 5.1 and older.

Turns out nothing of this is documented on the recipes, nor any controls are in place when starting the Puma servers. Hence mistakes happen. Let's fix this by properly documenting the recipes and add a check on the relevant control scripts.