LINUX: ifconfig's output has changed

net-tools in Fedora 18 has changed 'inet addr' to just 'inet' (possibly
to more closely match the ip command).

Reviewed-on: http://gerrit.openafs.org/8987
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Marc Dionne <marc.c.dionne@gmail.com>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
(cherry picked from commit 7d8b636d9493f3c470c1bbffb4a566060b21d98b)

Change-Id: Iac819b281a26bbd508805541c80e6f1f281a19f9
Reviewed-on: http://gerrit.openafs.org/9363
Reviewed-by: Derrick Brashear <shadow@your-file-system.com>
Tested-by: BuildBot <buildbot@rampaginggeek.com>
Reviewed-by: Paul Smeddle <paul.smeddle@gmail.com>
Reviewed-by: Andrew Deason <adeason@sinenomine.net>
Reviewed-by: Stephan Wiesand <stephan.wiesand@desy.de>