Bug#916178: roger-router-cli: missing dependency on cups

[Marc Lehmann <debian-reportbug@plan9.de>]

Package: roger-router-cli
Version: 1.8.14-2+b3
Severity: serious
Justification: Policy 3.5

Dear Maintainer,

roger-router-cli apparently depends on cups-daemon, but has no required
dependency on it. if only cups-client is installed, installation fails
because the daemon is not running:

Setting up roger-router-cli (1.8.14-2+b3) ...
lpadmin: Unable to connect to server: Bad file descriptor
dpkg: error processing package roger-router-cli (--configure):
 subprocess installed post-installation script returned error exit status 1

I *guess* the fix would be to make the dependency on cups optional in the
post-install script somehow.

-- System Information:
Debian Release: 9.6
  APT prefers stable
  APT policy: (990, 'stable'), (500, 'unstable-debug'), (500, 'testing-debug'), (500, 'stable-updates'), (500, 'stable-debug'), (500, 'unstable'), (500, 'testing'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386, x32

Kernel: Linux 4.18.20-041820-generic (SMP w/8 CPU cores)
Locale: LANG=C, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=C (charmap=UTF-8)
Shell: /bin/sh linked to /usr/bin/bash
Init: systemd (via /run/systemd/system)

Versions of packages roger-router-cli depends on:
ii  libasound2                      1.1.3-5
ii  libatk1.0-0                     2.30.0-1
ii  libc6                           2.27-8
ii  libcairo-gobject2               1.16.0-1
ii  libcairo2                       1.16.0-1
ii  libgdk-pixbuf2.0-0              2.36.5-2+deb9u2
ii  libgirepository-1.0-1           1.50.0-1+b1
ii  libglib2.0-0                    2.58.1-2
ii  libgssdp-1.0-3                  1.0.1-1
ii  libgstreamer-plugins-base1.0-0  1.10.4-1
ii  libgstreamer1.0-0               1.10.4-1
ii  libgtk-3-0                      3.24.1-2
ii  libgupnp-1.0-4                  1.0.1-1
ii  libpango-1.0-0                  1.42.4-4
ii  libpangocairo-1.0-0             1.42.4-4
ii  libpeas-1.0-0                   1.20.0-1+b1
ii  libportaudio2                   19.6.0-1
ii  libpulse0                       10.0-1+deb9u1
ii  libroutermanager0               1.8.14-2+b3
ii  libsecret-1-0                   0.18.5-3.1
ii  libsndfile1                     1.0.27-3
ii  libsoup2.4-1                    2.64.2-1
ii  libspeex1                       1.2~rc1.2-1+b2
ii  libspeexdsp1                    1.2~rc1.2-1+b2
ii  libtiff5                        4.0.8-2+deb9u4
ii  libxml2                         2.9.4+dfsg1-2.2+deb9u2

Versions of packages roger-router-cli recommends:
ii  cups-client  2.2.1-8+deb9u2
pn  cups-daemon  <none>
ii  ghostscript  9.26~dfsg-0+deb9u1

roger-router-cli suggests no packages.

-- no debconf information