Updated administrativia for safe_string.
Lwt_bytes: safe_string.
Lwt_chan: safe_string.
Lwt_unix: safe_string.
Lwt_io: safe_string.
Lwt_log: safe_string.
Lwt_process: safe_string.
Lwt_ssl: safe_string.
Lwt_simple_top: safe_string.