Dispatcher: allow `client` subcommand (e.g. `mina client status`) through the dispatcher. The `client` command is always routed to the mesa runtime binary with arguments passed through unmodified, regardless of hardfork activation state. This is a deliberate hack that works only because the GraphQL schema exposed by the daemon did not change between berkeley and mesa. If a future hard fork changes the GraphQL schema, client commands must be dispatched to the runtime matching the running daemon instead of unconditionally using mesa.
