message: Add icanhazip.com as IP source
  Add icanhazip.com as an alternative. Both ipinfo and checkip are sometimes inaccessible from certain areas.
diff: @@ -402,6 +402,7 @@ function set_hostname() {
  # We have more than one to try in case one starts failing
  # (e.g. https://github.com/Jigsaw-Code/outline-server/issues/776).
  local -ar urls=(
  + 'https://icanhazip.com/'
  'https://ipinfo.io/ip'
  'https://domains.google.com/checkip'
  )
  