* Ensure that TrackingReadConn and TrackingReader conform to io.Reader
Implementations of io.Reader should return io.EOF directly when the end of
the stream is reached, because callers will compare the error using ==.
* Update lib/srv/monitor_test.go
Co-authored-by: Zac Bergquist <zac.bergquist@goteleport.com>
* Use require.Equal for conn_test.go
Co-authored-by: Zac Bergquist <zac.bergquist@goteleport.com>
