Settings link in plugin view is not working

Hi Charles,

thanks for the work on the great plugin. Recently, I discovered that the settings link is not working if you access it via the plugins screen. The reason for it is in admin/admin.php:56.

I changed to the line from
array_unshift( $links, '<a href="' . admin_url( 'options-general.php' ) . '?page=wp-fail2ban-settings&tab=welcome">Settings</a>' );
to
array_unshift( $links, '<a href="' . admin_url( 'admin.php' ) . '?page=wp-fail2ban-settings">Settings</a>' );
to fix it.

Thanks in advance,

Matthieu