Merge remote-tracking branch 'remotes/thibault/tags/samuel-thibault' into staging

slirp updates

# gpg: Signature made Sun 14 Jan 2018 17:19:24 GMT
# gpg:                using RSA key 0x996849C1CF560478
# gpg: Good signature from "Samuel Thibault <samuel.thibault@aquilenet.fr>"
# gpg:                 aka "Samuel Thibault <sthibault@debian.org>"
# gpg:                 aka "Samuel Thibault <samuel.thibault@gnu.org>"
# gpg:                 aka "Samuel Thibault <samuel.thibault@inria.fr>"
# gpg:                 aka "Samuel Thibault <samuel.thibault@labri.fr>"
# gpg:                 aka "Samuel Thibault <samuel.thibault@ens-lyon.org>"
# gpg:                 aka "Samuel Thibault <samuel.thibault@u-bordeaux.fr>"
# gpg: WARNING: This key is not certified with sufficiently trusted signatures!
# gpg:          It is not certain that the signature belongs to the owner.
# Primary key fingerprint: 900C B024 B679 31D4 0F82  304B D017 8C76 7D06 9EE6
#      Subkey fingerprint: 3A3A 5D46 4660 E867 610C  A427 9968 49C1 CF56 0478

* remotes/thibault/tags/samuel-thibault:
  slirp: add in6_dhcp_multicast()
  slirp: removed unused code
  slirp: remove unnecessary struct declaration
  slirp: remove unused header
  slirp: avoid IN6_IS_ADDR_UNSPECIFIED(), rather use in6_zero()

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>