chore, check if gperf tool is present

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, gperfify dt-io specials (now, tomo, yday, etc.)

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
minor, gperfify fmt specials (ymd, ymcw, ywd, etc.)

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
fix, PEBKAC, fmt in __trans_dfmt_special() is deref'd already

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
fix, perform DT_SEXY "trick" in __trans_dfmt_special() in case gperf isn't available

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'core/dt-io' into next

* core/dt-io:
  fix, perform DT_SEXY "trick" in __trans_dfmt_special() in case gperf isn't available
  fix, PEBKAC, fmt in __trans_dfmt_special() is deref'd already
  minor, gperfify fmt specials (ymd, ymcw, ywd, etc.)
  minor, gperfify dt-io specials (now, tomo, yday, etc.)
  chore, check if gperf tool is present
minor, read and print %u specified weekdays

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, hygiene, collapse '%u' and '%w' cases in __tok_spec()

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
chore, make ywd default format adhere ISO in that Sun is displayed as 07

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
doc, mention %u in format documentation

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
doc, mention %D, and make %j an alias for %D

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
doc, mention how to get the calendar's year (%rY) as opposed to the gregorian year (%Y)

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
doc, mention and explain ywd dates in Calendars section of info page

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
doc, list calendar name spec equivalents in format.texi

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
doc, officially mention %s and %rs to obtain epoch stamps

Signed-off-by: Sebastian Freundt <freundt@ga-group.nl>
Merge branch 'core/dt-io' into next

* core/dt-io:
  doc, officially mention %s and %rs to obtain epoch stamps
  doc, list calendar name spec equivalents in format.texi
  doc, mention and explain ywd dates in Calendars section of info page
  doc, mention how to get the calendar's year (%rY) as opposed to the gregorian year (%Y)
  doc, mention %D, and make %j an alias for %D
  doc, mention %u in format documentation
  chore, make ywd default format adhere ISO in that Sun is displayed as 07
  chore, hygiene, collapse '%u' and '%w' cases in __tok_spec()
  minor, read and print %u specified weekdays
Merge branch 'next'

* next:
  doc, officially mention %s and %rs to obtain epoch stamps
  doc, list calendar name spec equivalents in format.texi
  doc, mention and explain ywd dates in Calendars section of info page
  doc, mention how to get the calendar's year (%rY) as opposed to the gregorian year (%Y)
  doc, mention %D, and make %j an alias for %D
  doc, mention %u in format documentation
  chore, make ywd default format adhere ISO in that Sun is displayed as 07
  chore, hygiene, collapse '%u' and '%w' cases in __tok_spec()
  minor, read and print %u specified weekdays
  fix, perform DT_SEXY "trick" in __trans_dfmt_special() in case gperf isn't available
  fix, PEBKAC, fmt in __trans_dfmt_special() is deref'd already
  minor, gperfify fmt specials (ymd, ymcw, ywd, etc.)
  minor, gperfify dt-io specials (now, tomo, yday, etc.)
  chore, check if gperf tool is present