docs:guide-user: would this go?
Eh, it does not fit in any existing category, but it is kinda like a VPN, although not a VPN so it goes in another category. It's big enough to make sense to have more than one article dedicated to it.
Since VPNs are in
docs:guide-user:services:vpn:something-something I'd say we can drop that guide in
https://openwrt.org/docs/guide-user/services/tor/start has been created now.