move httpserver under server

pkg/server/httpserver/tlshelpers.go

@@ -0,0 +1,24 @@
+package httpserver
+
+import "crypto/tls"
+
+func getDefaultTLSConfig() *tls.Config {
+	config := tls.Config{}
+
+	//Use only modern ciphers
+	config.CipherSuites = []uint16{
+		tls.TLS_RSA_WITH_AES_128_CBC_SHA,
+		tls.TLS_RSA_WITH_AES_256_CBC_SHA,
+		tls.TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA,
+		tls.TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA,
+		tls.TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA,
+		tls.TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA,
+		tls.TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256,
+		tls.TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256,
+	}
+
+	//Don't allow session resumption
+	config.SessionTicketsDisabled = true
+	config.ClientAuth = tls.RequireAnyClientCert
+	return &config
+}