Extension:Newsletter/nl issues table

mysql> describe nl_issues; +---+--+--+-+-+---+ +---+--+--+-+-+---+ +---+--+--+-+-+---+
 * Field            | Type             | Null | Key | Default | Extra |
 * nli_issue_id     | int(10) unsigned | NO   | PRI | NULL    |       |
 * nli_page_id      | int(11)          | NO   |     | NULL    |       |
 * nli_newsletter_id | int(11)         | NO   | PRI | NULL    |       |
 * nli_publisher_id | int(11)          | NO   |     | NULL    |       |