typmod support: UpdateGeometrySRID

[robe]

1)UpdateGeometrySRID should no longer update geometry_columns 2) If the table has srid enforced with constraints, use contraints again to define the new srid constraint. This is already built-in 3) If the table uses new typmod, then it should do an

ALTER TABLE ALTER column geometry(original_geometry (which it can query from geometry_columns), new_srid);

[robe]

Done at r7548