also support legacy format for completeness.
also support legacy format for completeness.

even though we don't use it anymore

raintank/raintank-metric,replay/metrictank,raintank/metrictank,replay/metrictank,replay/metrictank,raintank/metrictank,raintank/raintank-metric,replay/metrictank,raintank/metrictank,raintank/metrictank,raintank/raintank-metric