derp: add missing docs on clientInfo.Version
It's not the Tailscale version.
@@ -156,6 +156,8 @@ func (c *Client) parseServerInfo(b []byte) (*serverInfo, error) {
}
type clientInfo struct {
+ // Version is the DERP protocol version that the client was built with.
+ // See the ProtocolVersion const.
Version int `json:"version,omitempty"`
// MeshKey optionally specifies a pre-shared key used by
