[2.0.x] Confirmed support for PostGIS 2.4.

Backport of 5d5a2bd2 from master

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

@@ -12,7 +12,7 @@ Program                   Description                           Required
 `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                               2.2, 2.1, 2.0, 1.11, 1.10, 1.9
 :doc:`GeoIP <../geoip2>`  IP-based geolocation library          No                                2
-`PostGIS`__               Spatial extensions for PostgreSQL     Yes (PostgreSQL only)             2.3, 2.2, 2.1
+`PostGIS`__               Spatial extensions for PostgreSQL     Yes (PostgreSQL only)             2.4, 2.3, 2.2, 2.1
 `SpatiaLite`__            Spatial extensions for SQLite         Yes (SQLite only)                 4.3, 4.2, 4.1, 4.0
 ========================  ====================================  ================================  ===================================
 
@@ -37,6 +37,7 @@ totally fine with GeoDjango. Your mileage may vary.
     PostGIS 2.1.0 2013-08-17
     PostGIS 2.2.0 2015-10-17
     PostGIS 2.3.0 2016-09-26
+    PostGIS 2.4.0 2017-09-30
     SpatiaLite 4.0.0 2012-11-25
     SpatiaLite 4.1.0 2013-06-04
     SpatiaLite 4.2.0 2014-07-25