“Ulrich Drepper noted a difference between the Linux connect(2)
man page and the POSIX specification. The former states,
‘connectionless sockets may dissolve the association by connecting
to an address with the sa_family member of sockaddr set to
AF_UNSPEC.’ The latter reads, ‘if address is a null address for the
protocol, the socket’s peer address shall be reset.’ Ulrich
explained that he preferred the description in the Linux man page,
but the Linux kernel seems to actually follow the POSIX
specification, ‘is this functionality which got lost over time? Or
is the man page wrong and this never was the case? Is this a
worthwhile change…?'”