include owner of textpack string

[testdept]

plugin (over)writes entry in txp_lang table with empty owner field
should be owner=event or plugin-name?

sorry for my noob (Textpattern 4.6.2, terrible with Markdown/Textile)

related: plugin overwrites between $plugin['textpack'] = <<<EOT and EOT;

1. #@owner abc_plugin

2. arbitrary comment