[Development] QAbstractSocket::ShareAddress, SO_REUSEADDR and SO_REUSEPORT

[Charles-François Natali]

Hello,

I'm not familiar with the Qt development process so apologies if it's not
the correct list, but I'd like to know if someone could have a look at this
issue: https://bugreports.qt.io/browse/QTBUG-33419

Basically  QAbstractSocket::ShareAddress uses SO_REUSEPORT on recent-ish
Linux kernels, and unfortunately it doesn't have the same semantics as
SO_REUSEADDR, which broke several valid use cases.

The bug report contains more details and a proposed patch.

Cheers,

Charles
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