I have added a basic test and introduced an error when attempting to call `connect()` on an abstract AF_UNIX socket. Despite the announcement blog post explicitly stating otherwise, abstract AF_UNIX sockets are **not** supported by Windows (discussion here: https://github.com/microsoft/WSL/issues/4240). However, passing an abstract path to `bind()` or calling `listen()` or `accept()` on an abstract AF_UNIX socket does not yield an error.