[RFC] Asymmetric Visibility, v2

As promised, Ilija and I offer this revised version of asymmetric visibility. https://wiki.php.net/rfc/asymmetric-visibility-v2 It's still essentially the same as last year's version, but with a few adjustments and changes: * readonly properties are now supported in a logical fashion. * We've brought back the abbreviated form, as public-read, something else set is the most common use case. * The section on magic methods has been greatly simplified. The implementation itself hasn't changed, but the explanation is a lot less confusing now. * We've explained how aviz interacts with hooks (they don't, really) and with interface properties (in the obvious way), which didn't exist at the time of the last draft. * We've added a section with examples of how aviz is a concrete improvement, even in a world with readonly and hooks. * We've added a section discussing why the prefix-style syntax was chosen. *dons flame retardant suit* -- Larry Garfield larry@garfieldtech.com