Update postgresql

[matthiasbeyer]

Motivation for this change

As discussed in #15856 (comment)

[mention-bot]

By analyzing the blame information on this pull request, we identified @edolstra, @vcunat and @paraseba to be potential reviewers

[groxxda]

CC: @ocharles

[ocharles]

I would be happy with all these changes.

[alanorth]

PostgreSQL 9.3.13 has been out for a few weeks. I came to submit a pull request but saw this one. This is what I have built locally (on Mac OS X):

diff --git a/pkgs/servers/sql/postgresql/default.nix b/pkgs/servers/sql/postgresql/default.nix
index bd7b8fd..df44d78 100644
--- a/pkgs/servers/sql/postgresql/default.nix
+++ b/pkgs/servers/sql/postgresql/default.nix
@@ -86,9 +86,9 @@ in {
   };

   postgresql93 = common {
-    version = "9.3.11";
+    version = "9.3.13";
     psqlSchema = "9.3";
-    sha256 = "08ba951nfiy516flaw352shj1zslxg4ryx3w5k0adls1r682l8ix";
+    sha256 = "0ax7cb1lknzz4105spi8k71n71rb4jp00d2kscasifgxkg9f2i2m";
   };

   postgresql94 = common {

I don't use any other PostgreSQL versions so I haven't tested anything other than 9.3.x.

[paraseba]

This looks good to me.

I want to use the opportunity to ask a question, anybody here has opinions on the best way to fix #15512

Postgis extension is broken after the multiple outputs patch. Regrouping everything under a single output would fix it, but it's probably not something we want to do? Should we create a new package that contains both postgres and any extensions (the way the NixOs module does)?