[Pkg-samba-maint] Bug#900542: winbind: Can't upgrade winbind to 2:4.5.12+dfsg-2+deb9u2(stretch) or 2:4.7.4+dfsg-2(buster)

[Tomoo Nomura]

Package: winbind 
Version: 2:4.7.4+dfsg-2 
Severity: normal 
Tags: a11y

Dear Maintainer,

When I try to apt-get upgrade, winbind can't complete its process.
There are some problems.

1) Launch script can't work
   error: /lib/security/pam_winbind.so not found.
   However, /lib/x86_64-linux-gnu/security/pam_winbind.so exists.

2) Post install script couldn't work and apt-get upgrade failed.
   When samba-ad-dc was launched, winbind is already in process and the upgrade script try to launch winbind duplicately and failed upgrade.

3) winbind vendor preset: enable
   Samba-ad-dc launch winbind as its child. It means there is no need to launch winbind again, should be disable.

I confirmed the problem in both stretch and buster (2018-05-31)


-- Package-specific info:
* /etc/samba/smb.conf present, but not attached
* /etc/samba/dhcp.conf not present

-- System Information:
Debian Release: buster/sid
  APT prefers stable
  APT policy: (101, 'stable'), (100, 'testing')
Architecture: amd64 (x86_64)

Kernel: Linux 4.16.0-1-amd64 (SMP w/4 CPU cores)
Locale: LANG=ja_JP.UTF-8, LC_CTYPE=ja_JP.UTF-8 (charmap=UTF-8) (ignored: LC_ALL set to ja_JP.UTF-8), LANGUAGE=en_US:en (charmap=UTF-8) (ignored: LC_ALL set to ja_JP.UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled

Versions of packages winbind depends on:
ii  libbsd0           0.9.1-1
ii  libc6             2.27-3
ii  libldap-2.4-2     2.4.46+dfsg-5
ii  libpopt0          1.16-11
ii  libtalloc2        2.1.11-2
ii  libtdb1           1.3.15-4
ii  libtevent0        0.9.36-2
ii  libwbclient0      2:4.7.4+dfsg-2
ii  lsb-base          9.20170808
ii  samba-common      2:4.7.4+dfsg-2
ii  samba-common-bin  2:4.7.4+dfsg-2
ii  samba-libs        2:4.7.4+dfsg-2

winbind recommends no packages.

Versions of packages winbind suggests:
ii  libnss-winbind  2:4.7.4+dfsg-2
ii  libpam-winbind  2:4.7.4+dfsg-2

-- no debconf information