add missing parameter documentation

manifests/server_instance.pp

@@ -1,13 +1,18 @@
 # lint:ignore:140chars
-# @param instance_name
-# @param initdb_settings
-# @param config_settings
-# @param service_settings
-# @param passwd_settings
+# @param instance_name The name of the instance.
+# @param instance_user The user to run the instance as. Defaults to $instance_name if not specified.
+# @param instance_group The group to run the instance as. Defaults to $instance_name if not specified.
+# @param initdb_settings Specifies a hash witn parameters for postgresql::server::instance::initdb
+# @param config_settings Specifies a hash with parameters for postgresql::server::instance::config
+# @param service_settings Specifies a hash with parameters for postgresql::server:::instance::service
+# @param passwd_settings Specifies a hash with parameters for postgresql::server::instance::passwd
 # @param roles Specifies a hash from which to generate postgresql::server::role resources.
 # @param config_entries Specifies a hash from which to generate postgresql::server::config_entry resources.
 # @param pg_hba_rules Specifies a hash from which to generate postgresql::server::pg_hba_rule resources.
-# @param databases Specifies a hash from which to generate postgresql::server::db resources.
+# @param databases Specifies a hash from which to generate postgresql::server::database resources.
+# @param databases_and_users Specifies a hash from which to generate postgresql::server::db resources.
+# @param database_grants Specifies a hash from which to generate postgresql::server::database_grant resources.
+# @param table_grants Specifies a hash from which to generate postgresql::server::table_grant resources.
 
 # lint:endignore:140chars
 define postgresql::server_instance (