Otherwise they would get passed to getaddrinfo and fail with:
address resolution failed for [::1]🔢 Name or service not known

(Broken by commit v1.4.0-736-gf17c90be)
Signed-off-by: NJán Tomko <jtomko@redhat.com>
Cc: qemu-stable@nongnu.org
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
(cherry picked from commit 23307908)
Signed-off-by: NMichael Roth <mdroth@linux.vnet.ibm.com>