const crypto/tls.extensionSupportedVersions

6 uses

	crypto/tls (current package)
		common.go#L120: 	extensionSupportedVersions       uint16 = 43
		handshake_messages.go#L252: 			echOuterExts = append(echOuterExts, extensionSupportedVersions)
		handshake_messages.go#L254: 			exts.AddUint16(extensionSupportedVersions)
		handshake_messages.go#L585: 		case extensionSupportedVersions:
		handshake_messages.go#L784: 		exts.AddUint16(extensionSupportedVersions)
		handshake_messages.go#L936: 		case extensionSupportedVersions: