message: No longer upgrade python in travis OSX build, but overwrite links
  * We want to be sure that python3 is found, not python2. Travis's python is new
  enough but we need to force-link it
diff: brew update
  brew install qt5 lftp
  brew link qt5 --force
  -brew upgrade python
  +brew link --overwrite python
  echo '|1|DQR5DTWgBz2JwdQs1G6KpjppcIE=|oxLDo2zhfkFZ+/gsTcnXI/vC8qs= ecdsa-sha2-nistp256 AAAAE2VjZHNhLXNoYTItbmlzdHAyNTYAAAAIbmlzdHAyNTYAAABBBObosfTSrCa11pDrmPxJ6zzNltDJls3Vc0AMVrqX0hAGFoFWbGvdDm3wpDBYHpkL9LmG6bJNHqWmO59oUJZYl9E=' >> $HOME/.ssh/known_hosts
  