packaging: added Mamonsu 3 template examples, updated current templates to 3.2.1

Author: cuprumtan

packaging/conf/example.conf renamed to packaging/conf/example_linux.conf

@@ -1,5 +1,5 @@
 # This is a configuration file for mamonsu
-# To get more information about mamonsu, visit https://postgrespro.ru/docs/postgrespro/12/mamonsu
+# To get more information about mamonsu, visit https://postgrespro.com/products/extensions/mamonsu
 
 #########  Connection parameters sections  ##############