This is broken subdir-objects is currently broken in automake.
See http://debbugs.gnu.org/cgi/bugreport.cgi?bug=13928 for the bug
status, enabling it will cause xfpm to fail a make distcheck build.

This patch fixes it so that the many different --enable/--disable
options cause the build to still work properly.

Adds support for the battery plugin to be built and used in LXDE
as the system tray icon was removed. Thanks to
https://github.com/nandhp/multiload-nandhp as it was used as a
complete example on how to easily do this. There may be a couple
things that need to be added to make this have the same
functionality as the Xfce plugin.

This loweres the minimum upower version to support FreeBSD 10 out
of the box and fixes a couple other issues. The get_string_sysctl
function came from:
http://cgit.freedesktop.org/upower/tree/src/freebsd/up-util.c

The configure.ac.in script uses AC_CHECK_HEADERS for a ton of
things but the source files don't use those conditionals. This
patch adds those. This should fix building on GNU/Hurd.

This patch moves some code around, mostly putting shared stuff into
power-common inside common/. It also creates a new plugin to monitor
all the batteries in one icon on the panel rather than multiple icons
inside the system tray. It also removes the power-info application
as that will be moved inside the newly reworked settings dialog.

UPower dropped support for managing power. To continue to support
suspend and hibernate we'll add those functions into xfpm while
borrowing the helper code from xfce4-session.

* port most of the upower interfaces to upower-glib
* conditionalize stuff that has been deprecated in upower >= 0.99.0
* suspend / hibernate is handled by systemd/logind
* if upower is >= 0.99.0 and logind is not running, log errors
  (as functionality will be missing)

Signed-off-by: Eric Koegel <eric.koegel@gmail.com>

Update autotools, fix whitespace issue, change how the version
string is presented with make distcheck, fix --disable-dpms so
it will actually compile, and update the minimum versions for
the 4.12 roadmap.

Point to the online docs for xfpm's help. This also fixes it where
the help button was causing the preferences dialog to quit. Now
xfpm will also display the help page when plugged into the settings
dialog. This patch removes the old local docs as well.

installed by newer distros any more, so it's time to get rid of the HAL
brightness backend entirely, so drop it.

Since there are still X.org drivers which do not support brightness setting
through XRandR, add a xfpm-power-backlight-helper program which reads/writes
brightness setting in /sys/class/backlight/, and use it as a fallback if XRandR
brightness isn't available. Reading doesn't require any privileges, but for
writing the helper needs to be run as root through pkexec, so add a default
policy which allows running that without a password for the local foreground
console.

This was inspired from gnome-power-manager:

  http://git.gnome.org/browse/gnome-power-manager/commit/?id=4886023c

and the helper code comes from gpm, with slight adaptions.

Lierdakil, bug #6568

may fail to get suspend/hibernate polkit authorization.

subject for polkit auth detection.

Don't depend on libpolkit-gobject, instead use dbus-glib to get authorization information directly from polkitd