Docs: update partial reloads protocol

inertiajs/inertiajs.com#370

Author: skryukov

docs/guide/the-protocol.md

@@ -117,11 +117,13 @@ X-Inertia-Location: http://example.com/events/80
 
 When making Inertia requests, the partial reload option allows you to request a subset of the props (data) from the server on subsequent visits to the same page component. This can be a helpful performance optimization if it's acceptable that some page data becomes stale.
 
-When a partial reload request is made, Inertia includes two additional headers with the request: `X-Inertia-Partial-Data` and `X-Inertia-Partial-Component`.
+When a partial reload request is made, Inertia includes the `X-Inertia-Partial-Component` header and may include `X-Inertia-Partial-Data` and/or `X-Inertia-Partial-Except` headers with the request.
 
 The `X-Inertia-Partial-Data` header is a comma separated list of the desired props (data) keys that should be returned.
 
-The `X-Inertia-Partial-Component` header includes the name of the component that is being partially reloaded. This is necessary, since partial reloads only work for requests made to the same page component. If the final destination is different for some reason (eg. the user was logged out and is now on the login page), then no partial reloading will occur.
+The `X-Inertia-Partial-Except` header is a comma separated list of the props (data) keys that should not be returned. When only the `X-Inertia-Partial-Except` header is included, all props (data) except those listed will be sent. If both `X-Inertia-Partial-Data` and `X-Inertia-Partial-Except` headers are included, the `X-Inertia-Partial-Except` header will take precedence.
+
+The `X-Inertia-Partial-Component` header includes the name of the component that is being partially reloaded. This is necessary, since partial reloads only work for requests made to the same page component. If the final destination is different for some reason (e.g. the user was logged out and is now on the login page), then no partial reloading will occur.
 
 ```http
 REQUEST