Fixed #26592 -- Confirmed support for GDAL 2.1

Thanks Daniel Wiesmann for the report and the appropriate fixes.

docs/ref/contrib/gis/install/geolibs.txt

@@ -7,14 +7,14 @@ geospatial libraries:
 
 ========================  ====================================  ================================  ============================
 Program                   Description                           Required                          Supported Versions
-========================  ====================================  ================================  ============================
+========================  ====================================  ================================  ===================================
 :doc:`GEOS <../geos>`     Geometry Engine Open Source           Yes                               3.4, 3.3
 `PROJ.4`_                 Cartographic Projections library      Yes (PostgreSQL and SQLite only)  4.9, 4.8, 4.7, 4.6, 4.5, 4.4
-:doc:`GDAL <../gdal>`     Geospatial Data Abstraction Library   Yes (SQLite only)                 2.0, 1.11, 1.10, 1.9, 1.8, 1.7
+:doc:`GDAL <../gdal>`     Geospatial Data Abstraction Library   Yes (SQLite only)                 2.1, 2.0, 1.11, 1.10, 1.9, 1.8, 1.7
 :doc:`GeoIP <../geoip>`   IP-based geolocation library          No                                1.4
 `PostGIS`__               Spatial extensions for PostgreSQL     Yes (PostgreSQL only)             2.1, 2.0
 `SpatiaLite`__            Spatial extensions for SQLite         Yes (SQLite only)                 4.3, 4.2, 4.1, 4.0, 3.0
-========================  ====================================  ================================  ============================
+========================  ====================================  ================================  ===================================
 
 Note that older or more recent versions of these libraries *may* also work
 totally fine with GeoDjango. Your mileage may vary.
@@ -28,6 +28,8 @@ totally fine with GeoDjango. Your mileage may vary.
     GDAL 1.9.0 2012-01-03
     GDAL 1.10.0 2013-04-29
     GDAL 1.11.0 2014-04-25
+    GDAL 2.0.0 2015-06
+    GDAL 2.1.0 2016-04
     PostGIS 2.0.0 2012-04-03
     PostGIS 2.1.0 2013-08-17
     Spatialite 3.0.0 2011-12-30