core#20757:
doc: update -proxy, -onion and -onlynet info in tor.md
Improve the description of what these options do with regards to
tor or network traffic.
doc: update/improve automatic tor section of tor.md
doc: update tor.md manual config, move after automatic config
core#20587:
[doc] Tidy up Tor doc (more stringent)
This is a backport of core#20757 [2/2] (all the tor.md changes from that PR) and core#20587
Depends on D11031