Merge bitcoin/bitcoin#26741: doc: FreeBSD DataDirectoryGroupReadable Setting

499c464 doc: update DataDirectoryGroupReadable 1 in tor.md (Jesse Barton)

Pull request description:

  Updating tor.md doc to include mention of FreeBSD requiring the DataDirectoryGroupReadable be set to 1.
  Default per the FreeBSD man page is 0.

         DataDirectoryGroupReadable 0|1
     If this option is set to 0, don't allow the filesystem groupto
     readthe DataDirectory. If the option is setto 1, make the
     DataDirectory readable by the default GID. (Default:0)

ACKs for top commit:
  vasild:
    ACK 499c464

Tree-SHA512: 8750b49cd04e900435c7991d1a24641fd1171227c1f14ed59afb157f24c1ca60380d30aecfb174ca46fd5b4b99dcdb3a1cfd019aafc343362e8103abf7c17e6a

Author: fanquake

doc/tor.md

@@ -92,19 +92,13 @@ out by default (if not, add them):
 ControlPort 9051
 CookieAuthentication 1
 CookieAuthFileGroupReadable 1
+DataDirectoryGroupReadable 1
 ```
 
 Add or uncomment those, save, and restart Tor (usually `systemctl restart tor`
 or `sudo systemctl restart tor` on most systemd-based systems, including recent
 Debian and Ubuntu, or just restart the computer).
 
-On some systems (such as Arch Linux), you may also need to add the following
-line:
-
-```
-DataDirectoryGroupReadable 1
-```
-
 ### Authentication
 
 Connecting to Tor's control socket API requires one of two authentication