Add privacy levels description

Signed-off-by: DL6ER <dl6er@dl6er.de>

docs/ftldns/privacylevels.md

@@ -0,0 +1,36 @@
+Using privacy levels you can specify which level of detail you want to see in your Pi-hole statistics. The privacy level may be changed at any time without having to restart the DNS resolver. Note that queries with (partially) hidden details cannot be disclosed with a subsequent reduction of the privacy level. They can be changed either from the Settings page on the dashboard or in [FTL's config file](configfile.md).
+
+The available options are
+
+### Level 0 - show everything
+Doesn't hide anything, all statistics are available
+
+### Level 1 - hide domains
+Show and store all domains as `hidden`
+
+This setting disables
+
+- Top Domains
+- Top Ads
+
+### Level 2 - hide domains and clients
+Show and store all domains as `hidden` and clients as `0.0.0.0`
+
+This setting disables
+
+- Top Domains
+- Top Ads
+- Top Clients
+- Clients over time
+
+### Level 3 - paranoia mode (hide everything)
+Disabled basically everything except the most anonymous statistics
+
+This setting disables
+
+- Top Domains
+- Top Ads
+- Top Clients
+- Clients over time
+- Query Log
+- Long-term database logging

mkdocs.yml

@@ -28,7 +28,7 @@ pages:
   - 'Overview': "ftldns/index.md"
   - 'Blocking mode': "ftldns/blockingmode.md"
   - 'RegEx blocking': "ftldns/regex.md"
-#  - 'Privacy levels': "ftldns/privacy.md"
+  - 'Privacy levels': "ftldns/privacylevels.md"
 #  - 'Long-term database': "ftldns/database.md"
 #  - 'API documentation': "ftldns/api.md"
   - 'In-depth manual': "ftldns/in-depth.md"