Ability to edit pastes

[Fabizocker456]

It would be nice if users had the ability to edit pastes. If I share code via this pastebin, I may want to add more files, replace existing ones with updated versions, or maybe even delete unimportant ones.
To prevent DoS attacks/spamming, a long ratelimit (30 seconds or more) could be triggered on new file creation, and after a certain amount of time (1/4 of expiry?), editing could be blocked.
This could possibly be implemented in the API via another endpoint, whose URL is intentionally un-guessable (similar to deletion), and which is returned together with the paste/delete URL in the creation response (possibly only if a certain flag is set during creation, e.g. {.., "editable": true}, to remain fully backwards compatible)