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

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

* 'lsfd--timerfd' of https://github.com/masatake/util-linux:
  tests: (lsfd/filter) add a case for comparing floating point numbers
  tests: (lsfd) add a case for testing timerfd related columns
  tests: add ts_skip_capability
  tests: (mkfds) add a factory to make a timerfd
  lsfd.1.adoc: write about timerfd
  lsfd: print the detail of the timer associated with a timerfd
  lsfd: (filter) accept floating point numbers in expressions
  lsfd: (filter) support floating point number used in columns
  lsfd: (filter) reduce duplicated code in macro definitions
  lsfd: (filter) improve error message
  lsfd.1.adoc: revise type names for columns
  lsfd.1.adoc: fix typos
  lsfd: adjust coding style
  lsfd: fix a sentence in comment