fix winsock include on windows (#244)
fix winsock include on windows (#244)

On Windows we only include winsock2, not winsock

Signed-off-by: Yechiel Kalmenson <b570fba9aecf1651fa1bd75345294fe6019b6e96@pivotal.io>
envoyproxy/protoc-gen-validate,envoyproxy/protoc-gen-validate,envoyproxy/protoc-gen-validate,envoyproxy/protoc-gen-validate,envoyproxy/protoc-gen-validate