If the server offers us a SCSV instead of a real ciphersuite send a fatal alert
Use -O2 instead of -O3 with GCC as it seems tree-vectorize in 4.9.0
causes problems when it converts unaligned loads to aligned SSE loads.
Fix error in add_str2oid call, github pull req 28
Add TLS fallback signalling (draft-ietf-tls-downgrade-scsv-00)