add scr for ephemeral keys
scr session resumption example
adds SESSION_TICKET extension id.
adds HAVE_TLS_EXTENSIONS as a dependency to HAVE_SECURE_RENEGOTIATION
reduces tlsx semaphore from 16 to 8 bytes (128 flags to 64 flags).
refactors ConvertExtType() to TLSX_ToSemaphore() for a better name and behavior. Now the overflowing flags are set backwards from the end of the flags to avoid collisions.
fix session ticket warnings
allow client auth with scr
add server initiated scr
separate allow scr and force client scr in example client
fix TURN_ON mask
adds --enable-session-ticket configure option
Adds Session Ticket TLS Extension handling.
New Session Ticket Handshake Message handling is still needed for Session Tickets to work.
addition of curve25519 implementation