Describe CurveCP/example here.

See also the README file in nacl-20xxxxxx/curvecp:

  $ cd nacl-20110221/curvecp/
  $ cat README
  Example of use (with nacl-20110221/build/*/bin in $PATH):
    curvecpmakekey serverkey
    curvecpprintkey serverkey > serverkey.hex
    curvecpserver this.machine.name serverkey \
      127.0.0.1 10000 31415926535897932384626433832795 \
        curvecpmessage cat /usr/share/dict/words &
    curvecpclient this.machine.name `cat serverkey.hex` \
      127.0.0.1 10000 31415926535897932384626433832795 \
        curvecpmessage -c sh -c 'nacl-sha512 <&6'
    nacl-sha512 < /usr/share/dict/words