The current documentation describes HotRod headers and operations up to version 1.3. The chapter should be extended to cover newer headers and operations (for version 2.0 - 2.5)

The source of information can be found at https://github.com/infinispan/infinispan/blob/master/documentation/src/main/asciidoc/user_guide/server_protocols_hotrod_wire.adoc#_hot_rod_protocol_2_5

Some examples:
Operations: Auth Mech List, Authenticate, Add client listener for remote events, Remove client listener for remote events, Exec, Iteration Start, Iteration Next, Iteration End,
Headers: there are new headers (e.g. for remote events and for authentication but there are more of them)
New statistics returned since 2.5, e.g. globalCurrentNumberOfEntries