Merge remote-tracking branch 'remotes/kiszka/queues/slirp' into staging

* remotes/kiszka/queues/slirp:
  slirp smb with modern win guests when samba is also running on host
  qemu/slirp: Fix SMB security configuration on newer samba versions

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