PostGIS tiger geocoder should use cousub in addition to place for non-specific

[robe]

Seems if you do:

  SELECT pprint_addy(addy), ST_AsText(geomout), rating FROM geocode('Brooklyn, NY',1);

you get no answer back although Brooklyn is listed in tiger_data.ny_cousub.

However if you use a value that is in ny_place such as

  SELECT pprint_addy(addy), ST_AsText(geomout), rating FROM geocode('Bronxvilled, NY',1);

it works.

tiger should try to use tiger.cousub as well as tiger.place.

I think cousub might currently only be used for some joins.

this ticket was instigated by this stack exchange post:

​https://gis.stackexchange.com/questions/247928/postgis-not-geocoding-counties