Please merge from debian: 2:4.7.4+dfsg-1

It will only build with bionic-proposed atm, because of the build-dep bump to 1.2.3. That package is currently held in excuses because of the missing builders:

http://people.canonical.com/~ubuntu-archive/proposed-migration/update_excuses.html#ldb
ldb (2:1.2.2-2 to 2:1.2.3-1)
Maintainer: Debian Samba Maintainers
11 days old
missing build on ppc64el: ldb-tools, libldb-dev, libldb1, python-ldb, python-ldb-dev (from 2:1.2.2-2)
missing build on s390x: ldb-tools, libldb-dev, libldb1, python-ldb, python-ldb-dev (from 2:1.2.2-2)
Not considered

This bug was fixed in the package samba - 2:4.7.4+dfsg-1ubuntu1

---------------
samba (2:4.7.4+dfsg-1ubuntu1) bionic; urgency=medium

  * Merge with Debian unstable (LP: #1744779). Remaining changes:
    - debian/VERSION.patch: Update vendor string to "Ubuntu".
    - debian/smb.conf;
      + Add "(Samba, Ubuntu)" to server string.
      + Comment out the default [homes] share, and add a comment about
        "valid users = %s" to show users how to restrict access to
        \\server\username to only username.
    - debian/samba-common.config:
      + Do not change priority to high if dhclient3 is installed.
    - Add apport hook:
      + Created debian/source_samba.py.
      + debian/rules, debian/samba-common-bin.install: install hook.
    - Add extra DEP8 tests to samba (LP #1696823):
      + d/t/control, d/t/cifs-share-access: access a file in a share using cifs
      + d/t/control, d/t/smbclient-anonymous-share-list: list available shares
        anonymously
      + d/t/control, d/t/smbclient-authenticated-share-list: list available
        shares using an authenticated connection
      + d/t/control, d/t/smbclient-share-access: create a share and download a
        file from it
    - d/samba-common.dhcp: If systemctl is available, use it to query the
      status of the smbd service before trying to reload it. Otherwise,
      keep the same check as before and reload the service based on the
      existence of the initscript. (LP #1579597)
    - d/control, d/rules: Disable glusterfs support because it's not in main.
      MIR bug is https://launchpad.net/bugs/1274247

 -- Andreas Hasenack <email address hidden> Mon, 22 Jan 2018 16:31:41 -0200