Simple single-connection QUIC server example

This is a simple example of a QUIC server that accepts and handles one connection at a time. It demonstrates blocking use of the QUIC server API.

Type make to build and make run to run.

Usage:

./server <port-number> <certificate-file> <key-file>

Example client usage:

openssl s_client -quic -alpn ossltest -connect 127.0.0.1:<port-number>