net-misc/netifrc-0.2-pre1 added

netifrc-0.2-pre1 is based on commit 7d3d30ae67a195ec00d1488c57da6f4e9caa2a72.

I added the following patches:

 - Undo commit 732a9a49 (increase default dad_timeout to 10s,
   see bug 488250)

 - iproute2.sh - Add timeout information and timeout progress indicator
   (bug 488262)

 - iproute2.sh - No need to use grep for checking tentative state
   (bug 488260)

 - Workaround for rc_parallel=YES in _wait_for_carrier() is causing a
   broken output (bug 488256)