coded meaning of 1752/09/03 is only a default, and that everything is
now calculated dynamically.
You can now use -R reform-spec to specify an alternate reform. Read
the fine (new) man page for details on this. There is also a new -r
option which will make cal print the month (or year, if -y is also
given) in which the Gregorian Reform started. I say started only
because if you apply the reform at 9999/1/22, a chunk of January is
knocked out, February and March are missing entirely, and April starts
on the 5th. The use of -r with -y does pretty much what you'd expect.
Also, implement -d day-of-week so that you can tell cal to start the
week on something other that a Sunday. This addresses PR bin/8539 at
long last.
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