added collision dedection of new actors via registration function

architecture design proposal.md

@@ -255,10 +255,15 @@ interface ActorType {
 
 The registration of an actor type also registers every actor that is currently in the `listActorsOfThisType()`-list.
 
+To avoid new actor conflicts, a function must be called and return true when creating a new users or posts.
+
+```php
+function register_new_actor(ActorType $type, String $name) -> Bool
+```
 
 # Appendix
 
 ## The approach of youtube-dl
 
 [youtube-dl](https://github.com/ytdl-org/youtube-dl) is solving a similar problem with "extractors" that return data to the processing-chain of youtube-dl. They provide a base class that includes useful functions for common issues e.g. automatic testing, geo-bypassing, login/cookie/header management.
-They can also chain extractors recursivly, like a extractor for mastodon videos, that gets the video from the post and returns the source of the video, that could be youtube, vimeo or anything else youtube-dl supports.
+They can also chain extractors recursivly, like a extractor for mastodon videos, that gets the video from the post and returns the source of the video, that could be youtube, vimeo or anything else youtube-dl supports.