[TS-2503]: Dynamic TLS Record Sizing for better page load latencies.
 The strategy used is essentially to use small TLS records that fit into a
 single TCP segment for the first ~1 MB of data, increase record size to 16 KB
 after that to optimize throughput, and then reset record size back to a single
 segment after ~1 second of inactivity—lather, rinse, repeat.
update CHANGES