Add Mailman include option file so options aren't lost on update
I'm been writing up about how to use Mailman to send newsletters.
I cam accross a limition with the default cPanel configuration, in order to add a one-click unsubscribe link you have to add
OWNERS_CAN_ENABLE_PERSONALIZATION = 1
This option allows messages to have a personalized content per recipient. Apart from maybe more ressource usage I don't see why this wouldn't be enabled.
Once enabled you can add a single click unsubscribe link to your newsletters which makes much more sense.
All we need is a file in which to put custom variables that are added to /usr/local/cpanel/3rdparty/mailman/Mailman/mm_cfg.py when mailman is updated.