- Now we have two types of padding: long (pad to 900-1400) and traditional (0-256)
- Long padding is applied to tls handshakes and first (empty) packet
- Traditional padding is applied to all beginning (7) packets of the connection (counted two-way)
- Since receiver changed its way to unpad buffer in fd6973b, we can freely extend padding packet length easily in the future
- Simplify code

Now default withinPaddingBuffers = true to give it a chance to do unpadding

Thanks @H1JK