ST_GeomFromGeoJSON gives unexpected result

[dbaston]

As reported [on Stack Exchange](​https://gis.stackexchange.com/q/294250/18189):

Calling ST_GeomFromGeoJSON on a GeoJSON polygon that's missing one level of brackets:

SELECT ST_AsText(ST_GeomFromGeoJSON('{"type": "Polygon", "coordinates": [[0,0], [0,5], [5, 5], [5,0], [0,0]]}'));

Returns an empty 3D polygon:

 POLYGON Z EMPTY

[pramsey]

In 16724:

Parse error on incorrectly nested GeoJSON input
References #4164

[pramsey]

In 16725:

Parse error on incorrectly nested GeoJSON input
Closes #4164

[pramsey]

In 16726:

NL warning and add regression test
References #4164

[pramsey]

In 16727:

NL warning and add regression test
References #4164

[komzpa]

In 16772:

Add NEWS entry.

References #4164