I am sending updated version - the changes against last patch are two. I use pg_terminate_backed for killing other terminates like Tom proposed. I am not sure if it is 100% practical - on second hand the necessary right to kill other sessions is almost available - and consistency with pg_terminal_backend has sense. More - native implementation is significantly better then solution implemented outer. I fixed docs little bit - the timeout for logout (as reaction on SIGTERM is only 5 sec).
