Feature Creep: Consider introducing padding

[dennisjackson]

Although certificate messages are encrypted in TLS1.3, their length leaks information about which server is being visited. This leakage could be mitigated with padding introduced via Certificate Compression, at the cost of complicating the implementation and a minor size overhead.

As a hypothetical, using the Padme scheme with a maximum message size of 1500 B would give a leakage of ~3 bits and a maximum overhead of 5%.