[Libguestfs] [PATCH 0/9] Add filters to nbdkit.

[Richard W.M. Jones]

The first three patches are identical to:
  https://www.redhat.com/archives/libguestfs/2018-January/msg00079.html
  "[PATCH nbdkit v2 0/3] Refactor plugin_* functions into a backend"

The rest of the patches add filters using the new filter API
previously described here:
  https://www.redhat.com/archives/libguestfs/2018-January/msg00073.html

This needs a lot more testing -- and tests -- and I also want to write
a couple of more complicated filters to prove the point that the API
allows different plugin methods to be called from a single filter
method.

However the two included filters (delay and offset) do appear to work
well.

Rich.