Merge bitcoin#21753: doc: add -addrinfo to tor docs

65f30e4 doc: add -addrinfo troubleshooting section to tor.md (Jon Atack)

Pull request description:

  Follow-up to bitcoin#21595.

ACKs for top commit:
  jarolrod:
    ACK 65f30e4
  practicalswift:
    ACK 65f30e4
  0xB10C:
    ACK 65f30e4
  theStack:
    ACK 65f30e4

Tree-SHA512: d17fa007106b8f877d2632c99273c663a24f025febe52faec9b197c561df808fd6a92bb27992ccbf5c3cc0d82058a8c4b82a2f1b99325f0ddfdac5ef703ac7d7

doc/tor.md

@@ -18,6 +18,10 @@ There are several ways to see your local onion address in Dash Core:
 You may set the `-debug=tor` config logging option to have additional
 information in the debug log about your Tor configuration.
 
+CLI `-addrinfo` returns the number of addresses known to your node per network
+type, including Tor v2 and v3. This is useful to see how many onion addresses
+are known to your node for `-onlynet=onion` and how many Tor v3 addresses it
+knows when upgrading to current and future Tor releases that support Tor v3 only.
 
 ## 1. Run Dash Core behind a Tor proxy