Add missing enable control warnings

[Exxenoz]

Ref.: rpc_handler.cpp

std::unordered_set<std::string> create_rpc_control_impls ()
{
	std::unordered_set<std::string> set;
	set.emplace ("account_create");
	set.emplace ("account_move");
	set.emplace ("account_remove");
	set.emplace ("account_representative_set");
	set.emplace ("accounts_create");
	set.emplace ("backoff_info");
	set.emplace ("block_create");
	set.emplace ("bootstrap_lazy");
	set.emplace ("bootstrap_reset");
	set.emplace ("bootstrap_priorities");
	set.emplace ("database_txn_tracker");
	set.emplace ("epoch_upgrade");
	set.emplace ("keepalive");
	set.emplace ("ledger");
	set.emplace ("node_id");
	set.emplace ("password_change");
	set.emplace ("populate_backlog");
	set.emplace ("receive");
	set.emplace ("receive_minimum");
	set.emplace ("receive_minimum_set");
	set.emplace ("search_pending");
	set.emplace ("search_receivable");
	set.emplace ("search_pending_all");
	set.emplace ("search_receivable_all");
	set.emplace ("send");
	set.emplace ("stop");
	set.emplace ("unchecked_clear");
	set.emplace ("unopened");
	set.emplace ("wallet_add");
	set.emplace ("wallet_add_watch");
	set.emplace ("wallet_change_seed");
	set.emplace ("wallet_create");
	set.emplace ("wallet_destroy");
	set.emplace ("wallet_lock");
	set.emplace ("wallet_representative_set");
	set.emplace ("wallet_republish");
	set.emplace ("wallet_work_get");
	set.emplace ("work_generate");
	set.emplace ("work_cancel");
	set.emplace ("work_get");
	set.emplace ("work_set");
	set.emplace ("work_peer_add");
	set.emplace ("work_peers");
	set.emplace ("work_peers_clear");
	set.emplace ("wallet_seed");
	return set;
}