.. topic:: telnet

  .. todo:: the docs for both no_echo and telnet_neg have a see-also crossref for telnet(C) which doesn't exist (and never has, as far as I can tell.)

    Explanations probably include:

    - the reference was to the wrong location, and it's really supposed to be to an RFC or manpage or something
    - the doc existed but was accidentally nuked before existing version history
    - the doc was supposed to be made and never was