*
* @return array|null
* array = if there are links defined for this table.
* empty array - if there is a links.ini file, but no links on this table
* null - if no links.ini exists for this database (hence try auto_links).
*
* @return array|null
* array = if there are links defined for this table.
* empty array - if there is a links.ini file, but no links on this table
* null - if no links.ini exists for this database (hence try auto_links).