README.md in l2meter-0.9.1 vs README.md in l2meter-0.10.0

@@ -204,9 +204,31 @@
 # ...
 
 Metrics.count :users, 100500 # => count#my-app.users=100500
 ```
 
+## Scrubbing
+
+L2meter allows plugging in custom scrubbing logic that might be useful in
+environments where logging compliance is important.
+
+```ruby
+config.scrubber = ->(key, value) do
+  begin
+    uri = URI.parse(value)
+    uri.password = "scrubbed" if uri.password
+    uri.to_s
+  rescue URI::Error
+    value
+  end
+end
+
+Metric.log my_url: "https://user:[e-mail]"
+# => my-url="https://user:[e-mail]"
+```
+
+Note that returning nil value will make l2meter omit the field completely.
+
 ## Silence
 
 There's a way to temporary silence the log emitter. This might be userful for
 tests for example.