Wifi Blackout Workaround (Extension of ffpb-debug)

This patch extends ffpb-debug to include additional WiFi infos and values from the ath9k-debugfs (as proposed in gluon issue #130).

Due to the WiFi blackout problem with ath9k devices, gluon devs request additional
debugging data from the ath9k debugfs [1]. We follow this advice and try to fetch even
more data from the debugfs for ffpb-debug.

[1] https://github.com/freifunk-gluon/gluon/issues/130

Master

offline capabilty for ffpb-debug log file storing and sending them afterwards. should be triggered via conjob

  this script is intended to be run by a cronjob in $timeinterval and will
  automagically remove the report if send is succesful.

Signed-off-by: Stefan Kloepping <nothalpha@c3pb.de>

Signed-off-by: Stefan Kloepping <nothalpha@c3pb.de>

Copied from https://github.com/freifunk-gluon/packages/commit/341bb49b201ee734dbf842713b45e1d56ffaf517

This makes debugging a lot easier and you cannot forget to redirect the output
because this happens automatically.