[postgis-users] update Geometry_columns

[strk at refractions.net]

probe_geometry_columns() works by reading constraints, and
expects these constraints to have a given naming convention.
This is what happen when AddGeometryColumn() is invoked.

When you need to move data from a table to another
you have to make AddGeometryColumn() part of your flow,
or manually add entries in the geometry_columns table,
or - finally - set up constraints named as the ones created
by AddGeometryColumn() and invoke probe_geometry_column().

--strk;