squidclient(1) on Linux
The text be405b032e56, as Debian 3.1 (Sarge), Debian 3.0 (Woody), Debian 2.2 (Potato), Debian 2.1 (Slink), Debian 2.0 (Hamm) shipped it.
Flags it lists
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-h -
-i -
-m -
-p -
-r -
-s