2F18          ; mapped                 ; 535C          # 3.0  KANGXI RADICAL DIVINATION
2F19          ; mapped                 ; 5369          # 3.0  KANGXI RADICAL SEAL
2F1A          ; mapped                 ; 5382          # 3.0  KANGXI RADICAL CLIFF
2F1B          ; mapped                 ; 53B6          # 3.0  KANGXI RADICAL PRIVATE

   * This is like [toLowerCase] except that it does nothing if this contains any non-ASCII
   * characters. We want to avoid lower casing special chars like U+212A (Kelvin symbol) because
   * they can return ASCII characters that match real hostnames.
   */
  private fun String.asciiToLowercase(): String {
    return when {
      isAscii() -> lowercase(Locale.US) // This is an ASCII string.
      else -> this
    }
  }

     * fit comfortably within a single ethernet packet (1500 bytes) even with framing overhead.
     *
     * For tests this must be big enough to realize real compression on test messages like
     * 'aaaaaaaaaa...'. Our tests check if compression was applied just by looking at the size if
     * the inbound buffer.
     */
    const val DEFAULT_MINIMUM_DEFLATE_SIZE = 1024L
  }