consider adding option unique / onlyone to the campaign_villain

[samuellsk]

Now we have option always present (or something like that...) but that guarantees that it will be placed on the map.

If you increase villains to the point of 20 , than you "run out of" villains pool and this pool will be reused , resulting in placement of 2 adoxie priests (unremarkable dungeon)

Consider adding option , or changing the always presnet option to unique / onlyone / max_count ? That will check if such villain is placed , dont place it again.

Thank you.