CM-1546 Adjust the doc

COLLECTOR_PARAMS.md

@@ -47,6 +47,10 @@
 ### `ic`
 - md5 hash of the resolved id cookie when configuration `config.idCookie` is used. Empty parameter encodes that an
 idcookie was configured but failed to resolve.
+### `pip`
+- contains a b64 encoded string of IPv4 address
+### `pip6`
+- contains a b64 encoded string of IPv6 address
 
 ## Example of a request to a default collectorUrl:
 `https://rp.liadm.com/p?tna=v1.0.16&aid=a-00co&lduid=a-00co--bda8cda1-9000-4632-8c64-06e04fa8d113&duid=df9f30ab37f2--01dwcepmbbbqm0hvj4wytvyss4&pu=https%3A%2F%2Fwww.example.com%2F&se=eyJldmVudCI6InZpZXdIb21lUGFnZSJ9&dtstmp=1577968744235`

CONFIGURATION_OPTIONS.md

@@ -233,6 +233,21 @@ Example:
 }
 ```
 
+#### `identityResolutionConfig.extraAttributes` [Optional]
+IPv4 and IPv6 provided by prebid or clients.
+
+Example:
+```javascript
+{
+  identityResolutionConfig: {
+    extraAttributes: {
+      ipv4: '1.2.3.4',
+      ipv6: '2001:db8:3333:4444:5555:6666:7777:8888'
+    }
+  }
+}
+```
+
 ##### `contextSelectors` [Optional]
 The context selectors to collect from the current page.
 Example: