Related thread (2012): https://marc.info/?l=linux-netdev&m=133897212713981&w=2
FreeBSD[1] chose signatures of:
int bindat(int fd, int s, const struct sockaddr *addr, socklen_t addrlen);
int connectat(int fd, int s, const struct sockaddr *name,
socklen_t namelen);
An alternate implementation could instead augment `sockaddr_un`.
Also, if we're going to add a new bind and connect() syscalls, we
should also add a flags argument.
(Please CC on reply)
[1] https://www.freebsd.org/cgi/man.cgi?query=bindat&sektion=2
https://www.freebsd.org/cgi/man.cgi?query=connectat&sektion=2