Comment 6 for bug 1463553

I've just run into this related error (or discrepancy, at least) in the `unix(7)` man page:

"When the address of the socket is returned by getsockname(2), getpeername(2), and accept(2), its length is offsetof(struct sockaddr_un, sun_path) + strlen(sun_path) + 1, and sun_path contains the null-terminated pathname."