Merge branch 'various-fixes' of https://github.com/kerolasa/util-linux

Merge branch 'various-fixes' of https://github.com/kerolasa/util-linux

* 'various-fixes' of https://github.com/kerolasa/util-linux:
  kill: include sys/types.h before checking SYS_pidfd_send_signal
  libfdisk: fix pointer wraparound warning
  hwclock: update yacc file
  script: fix minor warning
  getopt: use examples installation directory in man page
  fstrim: randomize timer start time across 100 minutes
  various: use threadsafe versions of time functions [lgtm scan]
  write: fix potential string overflow