dgram: generalized send queue to handle close #9695
Closed
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Checklist
make -j8 test
(UNIX), orvcbuild test nosign
(Windows) passesAffected core subsystem(s)
dgram
Description of change
If the udp socket is not ready and we are accumulating
messages to send, it needs to delay closing the socket when
all messages are flushed.
Backport of #7066
cc @thealphanerd