New counter from the Linux kernel + generic framework to pass currently unknown counters via QMP for debug purposes.
Signed-off-by: Denis V. Lunev <d...@openvz.org> CC: Igor Redko <red...@virtuozzo.com> CC: Michael S. Tsirkin <m...@redhat.com> Changes from v2: - put "export unknown counters" code under ifdef Changes from v1: - removed !err in patch 1 by suggestion from Eric
