(Top): Fix brain ("protocol" -> "request").

doc/Protocol-A.texi

@@ -386,7 +386,7 @@ The most up-to-date version if this document can always be found at
 * Concepts::                    Articles, conferences, aux-items, @dots{}
 * Fundamentals::                The building blocks of Protocol A.
 * LysKOM Data Types::           Domain-specific data types used in Protocol A.
-* Protocol Requests::           Each protocol explained in depth.
+* Protocol Requests::           Each request explained in depth.
 * Asynchronous Messages::       Unsolicited information from the server.
 * Error Codes::                 All error codes with explanations.
 * Aux-Item Types::              All predefined aux-item types.