Bug#922414: irqbalance: avoid dependency on runit-helper for systems that do not use runit

[Daniel Kahn Gillmor <dkg@fifthhorseman.net>]

Package: irqbalance
Version: 1.5.0-3
Severity: normal

irqbalance apparently now depends on runit-helper.

For systems without runit installed, that is a strange additional
dependency.

Would it be possible to remove that dependency (or move it to a
Recommends: or something) to help make simpler systems?  I like runit,
and use it on several machines, but on machines where i don't use
runit, i don't want a runit-related package unnecessarily installed.

all the best,

         --dkg

-- System Information:
Debian Release: buster/sid
  APT prefers testing-debug
  APT policy: (500, 'testing-debug'), (500, 'testing'), (200, 'unstable-debug'), (200, 'unstable'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.19.0-1-amd64 (SMP w/4 CPU cores)
Kernel taint flags: TAINT_WARN
Locale: LANG=en_US.UTF-8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8), LANGUAGE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages irqbalance depends on:
ii  debconf [debconf-2.0]  1.5.70
ii  libc6                  2.28-6
ii  libcap-ng0             0.7.9-2
ii  libglib2.0-0           2.58.3-1
ii  libncursesw6           6.1+20181013-1
ii  libnuma1               2.0.12-1
ii  libsystemd0            240-5
ii  libtinfo6              6.1+20181013-1
ii  lsb-base               10.2018112800
ii  runit-helper           2.8.5

irqbalance recommends no packages.

irqbalance suggests no packages.

-- debconf information excluded