David Svantesson 7971b05d2b Fix API deadline removal (#8759)
* Handle deadline is zero (to remove deadline)

* Better API documentation for issue deadline.

* Add parameter to unset due date.

* Update pull edit API comment
2019-11-03 22:46:32 +08:00
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2019-11-03 22:46:32 +08:00
2019-10-17 11:26:49 +02:00
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