simple POD changes and the like

Netdisco/bin/create_netdisco_schema_version

@@ -35,3 +35,16 @@ ENDHELP
 };
  
 schema->create_ddl_dir( 'PostgreSQL', $version, $sql_dir, $preversion );
+
+=head1 create_netdisco_schema_version
+
+This script creates SQL DDL files of the Netdisco database schema.
+
+If called without any CLI options, it makes one SQL DDL file which will
+initialize the complete schema to the current DBIx::Class specification.
+
+If called with the "-p <version>" option, upgrade SQL DDL command files
+are created between the specified version and the current DBIx::Class
+specification.
+
+=cut