[systemd-devel] accept() and socket activation

[David Strauss]

Right now, I'm just using inet_ntop() for IP clients and nothing for
other types, but this does the annoying IPv6-mapped-IPv4 formatting.
instance_from_socket() in socket.c has some nice checks for this so
IPv4 comes out as a dotted quad, but maybe we should move that to
shared code?

It would be useful for socket-activated apps to be able to work with
(and log) any type of stream socket client transparently.