Windows/VC build fixes
Various small fixes and cleanups, new is_prime util
Cleanup handling of TLS AEAD nonce sizes, push all knowledge of what
the nonce sizes should be down to the ciphersuite generating script.
Avoid crashing if user types before handshake completes
Typo
Remove pubkey filters, broken for a long time and not useful
Use noexcept on swap
Let TLS policy disable putting the timestamp in the hello random fields
Add the script used to generate mp_comba.cpp
These should be template specializations
Replace Transformatio::nstart with start_raw so we can do a full set
of overloads in the base class with the same name.