Merge branch 'next'

* next:
  fix, PEBKAC, on unmatched input in dround(1) always break (regardless of -q|--quiet)
  test, provide regression for bug/19 (dround)
  fix, PEBKAC, on unmatched input in dadd(1) always break (regardless of -q|--quiet)
  test, provide regression for bug/19 (dadd)
  fix, PEBKAC, on unmatched input in dconv(1) always break (regardless of -q|--quiet)
  test, provide regression for bug/19