Added to sysmgt options for (Dunning et al., 2013) quantile estimator (incomplete: options for digest category and compression are still missing)
Added to sysmgt options for (Dunning et al., 2013) quantile estimator (incomplete: options for digest category and compression are still missing)

sguazt/prometheus,sguazt/prometheus,sguazt/prometheus,sguazt/dcsxx-testbed