g_network_address_address_enumerator_next_finish takes the first item of the
address list and moves the pointer to the next one, so we shouldn't do the same
in g_network_address_address_enumerator_next_async function
Fixes bug #593941
Higher-level wrappers around GResolver. GSocketConnectable provides an
interface for synchronously or asynchronously iterating multiple
socket addresses, with GNetworkAddress and GNetworkService providing
interfaces based on hostname and SRV record resolution.
Part of #548466.