Address search support for addr:place=* and place=neighbourhood.

https://groups.google.com/d/msg/osmand/iivA5OLpSEU/lQ19tJMUKAMJ
In the OSM data and in the wiki (http://wiki.osm.org/wiki/Tag:place=suburb), suburb is documented as part of a city.  So this is incosistent with the real meaning of the word "suburb", but in OSM place=suburb normally means district.

Maybe it's still useful to show all place names (even subareas) in city search though... just not in address search.  Let me know if you want me to drop suburb from this check.