Docs: hide Lwt_io.establish_server_safe
Docs: hide Lwt_io.establish_server_safe

This function will replace Lwt_io.establish_server. It's better if users
don't refer to it by its current name. The current
Lwt_io.establish_server will go through some deprecation process once
4.01 support is dropped.

See #260.

[skip ci]

rneswold/lwt,ocsigen/lwt,ocsigen/lwt,c-cube/lwt,rneswold/lwt,ocsigen/lwt,rgrinberg/lwt,rgrinberg/lwt,c-cube/lwt,c-cube/lwt,rgrinberg/lwt,rneswold/lwt,rgrinberg/lwt