Use OpenSSL 1.1.0 X5519 in Tor when available (if it's good)
OpenSSL 1.1.0 says it now has X5519 support. If it's done well, we should consider using it in Tor when linking against OpenSSL 1.1.0.
OpenSSL 1.1.0 says it now has X5519 support. If it's done well, we should consider using it in Tor when linking against OpenSSL 1.1.0.