VDR ACPI power button handling daemon (vdrpbd)
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vdrpbd is meant to be used on VDR based HTPC systems as a replacement for the
usually used "acpid". Its primary task is to forward the hardware power button
on mainboards to VDR so VDR can initiate a clean shutdown process.

Features:
- Faster than acpid with all the required external scripts.
- Emergency reboot feature. You don't loose the power button as safe emergency
  exit button. Just press it four times within three seconds and a clean reboot
  is triggered.
- Very easy to set up. If you want, you can just copy the "vdrpbd" file to your
  VDR system and execute it. VDR should react to the power button immediately!
- Systemd integration. If systemd is detected, then vdrpbd tries to register
  itself as "power button inhibitor". The module "Net::DBus" is required for
  this to work.
  Note that this requires systemd version 201 or later and vdrpbd has to be
  started by systemd (systemctl start vdrpbd):
  http://lists.freedesktop.org/archives/systemd-devel/2013-April/010171.html
  For older systemd versions you have to add the following line to your
  /etc/systemd/logind.conf:

  HandlePowerKey=ignore