Andrew Thoelke de183416f8 Update the behavior of key handles
* open output distinct key handles
* each handle must be closed
* destroying a key does not invalidate other handles
* closing a key can/might fail an active operation (but not required)
2019-09-05 09:38:06 +01:00
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2019-09-05 09:38:06 +01:00
2015-03-10 11:23:56 +00:00