#1898: Nathan Wagner's patch that adds a flag 2 to allow ST_DelaunayTriangles to dump out a TIN. Just commit and see if winnie has same issue with shp2pgsql-gui checks

git-svn-id: http://svn.osgeo.org/postgis/trunk@11361 b70326c6-7e19-0410-871a-916f4a2858ee