Merge branch 'lsfd--revise-help-message' of https://github.com/masatake/util-linux

Merge branch 'lsfd--revise-help-message' of https://github.com/masatake/util-linux

* 'lsfd--revise-help-message' of https://github.com/masatake/util-linux:
  lsfd: show default columns in the help message
  lsfd: update the help message for XMODE column
  lsfd: introduce -H, --list-columns option for making help messages short
  lsfd: (man) fix the form for the optional argument of --inet option
  lsfd: rearrange the aligment of the help messages
  lsfd: use the specified output stream for printing help messages