raise PostgreSQL requirement to 9.6

The new code uses the open-ended array notation which is only
available sind psql 9.6.

.github/workflows/ci-tests.yml

@@ -40,7 +40,7 @@ jobs:
                 ubuntu: [18, 20]
                 include:
                     - ubuntu: 18
-                      postgresql: 9.5
+                      postgresql: 9.6
                       postgis: 2.5
                       pytest: pytest
                       php: 7.2

docs/admin/Faq.md

@@ -79,7 +79,7 @@ When running the import you may get a version mismatch:
 
 pg_config seems to use bad includes sometimes when multiple versions
 of PostgreSQL are available in the system. Make sure you remove the
-server development libraries (`postgresql-server-dev-9.5` on Ubuntu)
+server development libraries (`postgresql-server-dev-13` on Ubuntu)
 and recompile (`cmake .. && make`).
 
 

docs/admin/Installation.md

@@ -41,7 +41,7 @@ For compiling:
 
 For running Nominatim:
 
-  * [PostgreSQL](https://www.postgresql.org) (9.5+ will work, 11+ strongly recommended)
+  * [PostgreSQL](https://www.postgresql.org) (9.6+ will work, 11+ strongly recommended)
   * [PostGIS](https://postgis.net) (2.2+ will work, 3.0+ strongly recommended)
   * [Python 3](https://www.python.org/) (3.6+)
   * [Psycopg2](https://www.psycopg.org) (2.7+)

module/CMakeLists.txt

@@ -1,6 +1,6 @@
 # just use the pgxs makefile
 
-foreach(suffix ${PostgreSQL_ADDITIONAL_VERSIONS} "13" "12" "11" "10" "9.6" "9.5" "9.4" "9.3")
+foreach(suffix ${PostgreSQL_ADDITIONAL_VERSIONS} "14" "13" "12" "11" "10" "9.6")
     list(APPEND PG_CONFIG_HINTS
          "/usr/pgsql-${suffix}/bin")
 endforeach()