text: I've reactivated this since (according t the person who resolved it) it was resolved by mistake.
  
  As a bit of background, the reason that I added the note in the first places was that I use sac_scale as a hint at map.atownsend.org.uk to decide whether and how to render some paths.  Commonly used values are at https://taginfo.openstreetmap.org/keys/sac_scale#values , and GoodClover's linked to the wiki above.  I added the note so that someone spots it when in the area and says "I know that footpath - it should be sac_scale=hiking" or maybe "it doesn't need a sac_scale key at all".