Vasil Dimov 4c6798a3d3 tor: enable PoW defenses for automatically created hidden services ...

Enable PoW defenses [1] for hidden services that we create via
Tor Control using the `ADD_ONION` command [2].

The ability to do that has been added in tor-0.4.9.2-alpha [3]. Previous
versions return a syntax error to the `ADD_ONION` command with
`PoWDefensesEnabled=1`, so the approach here is to try with PoW and if
we get syntax error, then retry without PoW.

[1] https://tpo.pages.torproject.net/onion-services/ecosystem/technology/security/pow/
[2] https://spec.torproject.org/control-spec/commands.html#add_onion
[3] 02c1804446

2026-02-19 12:08:10 +01:00

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