MFC of r205821 r205827 r205828 r205862 r205872 r205937 r206568
MFC of r208825 r208826 r208827 r208828 r208829 r208943

r205821:
Long awaited update to the calendar system:

• Repeating events which span multiple years (because of -A, -B or just the three days before the end of the year).
• Support for lunar events (full moon, new moon) and solar events (equinox and solstice, chinese new year). Because of this, the options -U (UTC offset) and -l (longitude) are available to compensate if reality doesn't match the calculated values.

r205828:
Use local names for calendar.dutch

r205862:
Fix DST thingies in calendar.australia

r205872:
Make licenses 3 clause instead of 4 clause

r205937:
Make the dates in the Tasmanian part of calendar.australia properly
variable.

r206568:
Typo in Allerheiligen in calendar.dutch

r208825, r208826, r208827, r208828, r208829, r208943:
Coverity Prevent related fixes.