Merge branch '4.4' into 5.3

* 4.4:
  Update database.rst

Author: javiereguiluz

session/database.rst

@@ -436,7 +436,7 @@ PostgreSQL
         sess_lifetime INTEGER NOT NULL,
         sess_time INTEGER NOT NULL
     );
-    CREATE INDEX sessions_sess_time_idx ON sessions (sess_lifetime);
+    CREATE INDEX sessions_sess_lifetime_idx ON sessions (sess_lifetime);
 
 Microsoft SQL Server
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