Merge #12384: [Docs] Add version footnote to tor.md (#3473)

* Merge #12384: [Docs] Add version footnote to tor.md

39d2911 [Docs] Add version footnote to tor.md (Damian Williamson)

Pull request description:

  [Docs] Add version footnote to tor.md

  Added note to section 2, part -edits to `/etc/tor/torrc`- indicating this is only required for Tor version 0.2.7.0 and older, since section 3 states it is valid for Tor version 0.2.7.1 and newer. Added ref link from section 2 version footnote to section 3. Re-styled headings to work on GitHub -alternate heading style markup creation issue with numbered headings and thus headings and automatic heading links are broken-

  Ref: [Issue# 12376](https://github.com/bitcoin/bitcoin/issues/12376)

  Signed-off-by: Damian Williamson \<willtech@live.com.au\>

Tree-SHA512: 439f4ccc3e196011af448b220adf26b0e653ac589bf4cfbbc276c1500c9d08f209c9d6101e4d232857779d9f25164cfb222ed30e3d63de116f9121e6ebde31c3
Signed-off-by: pasta <pasta@dashboost.org>
Signed-off-by: Pasta <pasta@dashboost.org>

* bitcoin -> Dash Core

Signed-off-by: Pasta <pasta@dashboost.org>

Co-authored-by: Wladimir J. van der Laan <laanwj@gmail.com>

doc/tor.md

@@ -1,5 +1,4 @@
-TOR SUPPORT IN DASH CORE
-=======================
+# TOR SUPPORT IN DASH CORE
 
 It is possible to run Dash Core as a Tor hidden service, and connect to such services.
 
@@ -10,8 +9,7 @@ See [Tor Project FAQ:TBBSocksPort](https://www.torproject.org/docs/faq.html.en#T
 for how to properly configure Tor.
 
 
-1. Run Dash Core behind a Tor proxy
-----------------------------------
+## 1. Run Dash Core behind a Tor proxy
 
 The first step is running Dash Core behind a Tor proxy. This will already make all
 outgoing connections be anonymized, but more is possible.
@@ -44,12 +42,12 @@ In a typical situation, this suffices to run behind a Tor proxy:
 	./dashd -proxy=127.0.0.1:9050
 
 
-2. Run a Dash Core hidden server
--------------------------------
+## 2. Run a Dash Core hidden server
 
 If you configure your Tor system accordingly, it is possible to make your node also
 reachable from the Tor network. Add these lines to your /etc/tor/torrc (or equivalent
-config file):
+config file): *Needed for Tor version 0.2.7.0 and older versions of Tor only. For newer
+versions of Tor see [Section 4](#4-automatically-listen-on-tor).*
 
 	HiddenServiceDir /var/lib/tor/dashcore-service/
 	HiddenServicePort 9999 127.0.0.1:9999
@@ -99,8 +97,7 @@ for normal IPv4/IPv6 communication, use:
 	./dashd -onion=127.0.0.1:9050 -externalip=ssapp53tmftyjmjb.onion -discover
 
 
-3. List of known Dash Core Tor relays
-------------------------------------
+## 3. List of known Dash Core Tor relays
 
 Note: All these nodes are hosted by masternodehosting.com
 
@@ -116,8 +113,7 @@ Note: All these nodes are hosted by masternodehosting.com
 * fijy6aikzxfea54i.onion
 
 
-4. Automatically listen on Tor
---------------------------------
+## 4. Automatically listen on Tor
 
 Starting with Tor version 0.2.7.1 it is possible, through Tor's control socket
 API, to create and destroy 'ephemeral' hidden services programmatically.
@@ -143,10 +139,9 @@ which has the appropriate permissions. An alternative authentication method is t
 of the `-torpassword` flag and a `hash-password` which can be enabled and specified in 
 Tor configuration.
 
-5. Privacy recommendations
----------------------------
+## 5. Privacy recommendations
 
-- Do not add anything but bitcoin ports to the hidden service created in section 2.
+- Do not add anything but Dash Core ports to the hidden service created in section 2.
   If you run a web service too, create a new hidden service for that.
   Otherwise it is trivial to link them, which may reduce privacy. Hidden
   services created automatically (as in section 3) always have only one port