ADD @vmatch attribute to <tag> element of feature in map_features.xml. Matching tag values can be specified as a literal, a *, or a regex. This allows grouping of several closely related tags into one feature, and also allows deprecated tags to be matched without being propagated.
FIX definition of traffic_calming=* and demonstrate the new feature. Previously once you chose an item from the drop down, it wouldn't be recognised as a traffic_calming any more.
Addresses http://trac.openstreetmap.org/ticket/3528