code: public static URI appendPathToSingleUri(final URI uri, final String relativeOrAbsoluteUri)
              throws URISyntaxException {
          return appendPathToSingleUri(uri, relativeOrAbsoluteUri, "/");
      }
docs: Appends a path to a URI correctly using "/" as separator.
  
  @param uriList
  The base Uri.
  @param relativeOrAbslouteUri
  The relative or absloute URI.
  @return The appended Uri.
  @throws URISyntaxException