It is, it's the task of the kernel to refuse to create ipv6 sockets if
ipv6 is disabled, certainly not that of the software to find the
platform specific way of caring if ipv6 is enabled or not.

Open a bug against the kernel if you think this is really an issue (I do
not see what's the issue if ipv6 really is disabled those sockets are
just harmless and will never be used).

Given that the 'addresses' presented there are the undefined 'null' addresses and you are specifically meant to be able to bind to them with no addresses existing (http://www.freedesktop.org/wiki/Software/systemd/NetworkTarget/ ... :: and ::1 plus 0.0.0.0 and 127.0.0.1 are defined as unconditionally available) I'd say that was not a bug at any rate ...

In the event of addresses being added to the interfaces there is no need to bounce the service to get it to listen on them which would otherwise be the case...