[Libguestfs] FYI: nbdkit / libnbd --vsock now has a regression test

[Richard W.M. Jones]

Since Linux >= 5.6 supports vsock in loopback mode, I was able to add
a regression test for this feature to nbdkit / libnbd, and I can
report that it appears to work fine.

https://github.com/libguestfs/nbdkit/commit/5e4745641bb4676f607fdb3f8750dbf6e9516877

Rich.

-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
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