Change done due to uplift of the buildroot to the 2016.02
Please note that some of the options just changed their position.

Some changes:

remove:
--DOS2UNIX
--UNIX2DOS
--FDFORMAT (we don't have floppy)
--EJECT (we don't have CD/DVD)
--HDPARM (we don't have ATA drives)
--ETHER_WAKE (to send wake-on-lan magic packet)
--DNSD (we don't need DNS server)
--NAMEIF (we don't want to change names of interfaces)

remove the following, since they're provided by prosps_ng:
--pidof
--top
--uptime
--free
--kill*
--ps
--sysctl
--watch

add:
--LFS (large file support)
--MD5_SMALL=0 (We don't care so much about the size, more about
  the performance. Use the fastest. Difference in the size is very
  small anyway.)
--SHA3_SMALL=0 (like above)
--CONFIG_GZIP_FAST=2 (like above, use the fastest)
--FEATURE_LESS_WINCH and FEATURE_LESS_ASK_TERMINAL allow to display i.e.
  "less" command via serial terminal with non standard terminal sizes.
Signed-off-by: Adam Wujek <adam.wujek@cern.ch>