code: static String encUric(final String content, final Charset charset) {
          return urlEncode(content, charset, URIC, false);
      }
docs: Encode a String using the {@link #URIC} set of characters.
  <p>
  Used by URIBuilder to encode the query and fragment segments.
  
  @param content the string to encode, does not convert space to '+'
  @param charset the charset to use
  @return the encoded string