DHT_bootstrap(1) on Linux
The text 635e5ee29268, as Debian 13 (Trixie), Debian 12 (Bookworm), Debian 11 (Bullseye), Debian 10 (Buster) shipped it. The page shows this text now.
A simple DHT bootstrap node
Flags it lists
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--ipv4 -
--ipv6