50a34e55b2
This patch is heavily inspired by bd0d8ed807d29faa3deee96bafcbbd76c8fa4060 which added a setcap wrapper for `mtr` in order to allow running `mtr` without `sudo`. The need for the capability `cap_net_raw` that can be registered using `setcap` has been documented in the Arch Wiki: https://wiki.archlinux.org/index.php/Capabilities#iftop A simple testcase has been added which starts two machines, one with a setcap wrapper for `iftop`, one without. Both testcases monitor the bandwidth usage of the machine using the options `-t -s 1` once, the machine with setcap wrapper is expected to succeed, the `iftop` on the machine without setcap wrapper is expected to return a non-zero exit code.
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