message: check url if tagged version exists, otherwise use release
diff: @@ -44,7 +44,7 @@ function _main()
  pushd "$PATH_TO_REMOTE" || exit
  for REMOTE_FILE in "${_REMOTE_FILES[@]}"
  do
  - if [ "${#PROTOCOL_VERSION}" = '3' ]; then
  + if ( ! curl -Isf "$_BASE_URL/v$PROTOCOL_VERSION/$REMOTE_FILE" > /dev/null 2>&1 ); then
  log "... downloading RC $PROTOCOL_VERSION :: $REMOTE_FILE"
  curl -O "$_BASE_URL/release-$PROTOCOL_VERSION/$REMOTE_FILE" > /dev/null 2>&1
  else
  