[Libguestfs] [PATCH nbdkit 0/3] tar: Implement tar-limit

This patch series cleans up some issues with nbdkit-tar-filter and (in patch 3) implements a new tar-limit feature which limits how much of the tar file we will read to find the entry within the tar file that we will serve. This protects against the case where a tar file is presented that contains much content at the front that we must iterate over (and download) before we get to the entry we are interested in. See also: https://github.com/kubevirt/containerized-data-importer/pull/2748#issueco... Rich.