add new system file

hc

2024-02-20 102a0743326a03cd1a1202ceda21e175b7d3575c

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# Locally calculated
sha256    f733eeea371a7577f8fe353d86dd88d16f5b2a2e702bd96f5ffb2c197d9b4f97    iftop-1.0pre4.tar.gz