Define new &address_standardizer_required; xml constant and flag functions requiring it

git-svn-id: http://svn.osgeo.org/postgis/trunk@12817 b70326c6-7e19-0410-871a-916f4a2858ee
#2852 sfcgal extension needs to be relocatable

git-svn-id: http://svn.osgeo.org/postgis/trunk@12818 b70326c6-7e19-0410-871a-916f4a2858ee