Merge branch 'lsfd-minor-updates' of https://github.com/masatake/util-linux

Merge branch 'lsfd-minor-updates' of https://github.com/masatake/util-linux

* 'lsfd-minor-updates' of https://github.com/masatake/util-linux:
  lsfd: use skip_space()
  lsfd: use "struct in_addr" to represent IPv4 addresses
  lsfd: don't put a spcae between a function and its arguments
  lsfd: delete a redundant cast operation
  tests: (mkfds) fix typos in error messages
  tests: (mkfds) fix typos in factory descriptions
  tests: (mkfds) check the privilege required in the factory to run