const crypto/tls.extensionECHOuterExtensions

4 uses

	crypto/tls (current package)
		common.go#L132: 	extensionECHOuterExtensions      uint16 = 0xfd00
		ech.go#L325: 				if extension == extensionECHOuterExtensions {
		ech.go#L349: 							extType == extensionECHOuterExtensions {
		handshake_messages.go#L312: 		exts.AddUint16(extensionECHOuterExtensions)