+The token is an identifier that the the client must give to be authentificated.
+
+At start, afb-daemon get an initial token. This initial token must be presented
+incoming client to be authentificated.
+
+A token is valid only for a period.
+
+The token must be renewed periodically. When the token is renewed, afb-daemon
+sends the new token to the client.
+
+Tokens generated by afb-daemon are UUIDs.