Merge branch 'master' of github.com:bvanassche/fio

* 'master' of github.com:bvanassche/fio:
  blktrace: fix error handling in merge_blktrace_iologs
  ioengines: record all sync io_u completions under DDIR_SYNC in total_io_u
  io_ddir: add "syncfs" to io_ddir_name() array