[Libguestfs] [PATCH nbdkit 0/9] Create libnbdkit.so

[Richard W.M. Jones]

This creates libnbdkit.so as discussed in the following thread:
https://www.redhat.com/archives/libguestfs/2020-March/thread.html#00203

test-delay-shutdown.sh fails for unclear reasons.

This series starts by reverting "tests: Don't strand hung nbdkit
processes" which is because several other tests fail randomly unless I
revert this patch.  I didn't investigate this yet so it could be
caused by this patch series.

libtool on Linux doesn't appear to care about -undefined/-no-undefined.
See comments in commit messages.

The patch is kind of ugly TBH.  Personally I don't have a problem with
plugins having undefined references that are later resolved to the
main binary, but I understand that Windows is broken in this regard.

Rich.