Allow members to request their own account be deleted

[Arthmoor]

In looking into this for some members who have asked to have their accounts deleted, I am surprised to find there's no native support for it in the package and no mention of this ability outside of a $20 plugin in the marketplace.

Why has this not yet been made a native function of IPB itself? The desire to delete one's account from a service is becoming more and more common the more sites people realize they're on and don't want to be.