Bug 24643 – Allow overriding of private/package class methods

"Symbols with private visibility can only be accessed from within the same module. Private member functions are implicitly final and cannot be overridden." This makes no sense as a derived class in the same module can "see" the method. Also, the spec says nowhere that `package` visibility functions aren’t virtual or abstract, but one get the error message: "function `A.f` `package` functions cannot be `abstract`" And they cannot be overridden.

THIS ISSUE HAS BEEN MOVED TO GITHUB https://github.com/dlang/dmd/issues/20479 DO NOT COMMENT HERE ANYMORE, NOBODY WILL SEE IT, THIS ISSUE HAS BEEN MOVED TO GITHUB