FEATURE: allow users to specify if prepared statements are allowed

(they need to be disabled for pgpool based setups)

app/models/global_setting.rb

@@ -26,6 +26,8 @@ class GlobalSetting
     hash["host_names"] = [ hostname ]
     hash["database"] = db_name
 
+    hash["prepared_statements"] = !!self.db_prepared_statements
+
     {"production" => hash}
   end
 

config/discourse_defaults.conf

@@ -39,6 +39,10 @@ db_username = discourse
 # password used to access the db
 db_password =
 
+# allow usage of prepared statements, must be disabled for
+# pgpool transaction pooling
+db_prepared_statements = true
+
 # hostname running the forum
 hostname = "www.example.com"