Jeremy Evans ed27c2514c Update UnixSocket#recv_io tests to handle receiving a UnixSocket
Receiving UnixSocket works fine if you don't provide a mode, and
I think it is reasonable to expect that you should not provide
a mode if klass.for_fd would not accept a mode.

Fixes [Bug #11778]
2020-09-22 15:44:34 -07:00
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