[PATCHv2 0/2] libudev input-hotplug backend

[Julien Cristau]

Hi,

I think I addressed all comments from the first version, so here's v2.
The first patch moves config_init(), AFAICT the hal backend still works
with it.

Remaining question:
- libudev doesn't give any error if it can't get to /sys or
  /dev/.udev/db, we just don't get any devices (this bit me when trying
  out this code in a chroot).  Is this a libudev bug?  Can we handle
  that better?

Changes from v1:
- move config_init() later in main() so we can get rid of the timer and
  add devices directly
- share some code between the udev and hal backends
- check for duplicate devices
- move config/udev.c's global variables to the top of the file
- configure.ac: move libudev requirement to a variable
- xfree86: don't duplicate the log message for hal/udev
- use udev_monitor_filter_add_match_subsystem_devtype to only monitor
  input events
- use Xprintf instead of xalloc/sprintf
- call udev_monitor_enable_receiving before udev_enumerate_scan_devices
- indent with 4 spaces instead of tab
- handle server/udev the same way as server/hal in kdrive and xfree86's
  NewInputDeviceRequest
- turn "unhandled action" message from ErrorF to DebugF (we can also get
  "change" messages)