Add/ignore popular tags

Ignore:
* `motor_vehicle=agricultural;forestry`: This is covered by standard access
  tagging. I am uncertain why someone decided to create a page for a tag
  consisting of a list of values.

git-svn-id: https://josm.openstreetmap.de/svn/trunk@19210 0c6e7542-c601-0410-84e7-c038aed88b3b

Author: taylor.smock

resources/data/validator/ignoretags.cfg

@@ -396,6 +396,7 @@ K:highway=trail
 K:indoor=door
 K:natural=hill
 K:natural=slope
+K:motor_vehicle=agricultural;forestry
 K:piste:grooming=classic;skating
 K:product=wine
 K:railway=derail