protocol/rtcp: fix case of protocols in comments

protocol/rtcp/client.go

@@ -21,7 +21,7 @@ const (
 
 type log func(lvl int8, msg string, args ...interface{})
 
-// client is an rtcp client that will hadle receiving SenderReports from a server
+// client is an RTCP client that will hadle receiving SenderReports from a server
 // and sending out ReceiverReports.
 type client struct {
 	ErrChan     chan error
@@ -88,7 +88,7 @@ func (c *client) Start() {
 }
 
 // Stop sends a quit signal to the send and receive routines and closes the
-// udp connection. It will wait until both routines have returned.
+// UDP connection. It will wait until both routines have returned.
 func (c *client) Stop() {
 	c.log(logger.Debug, pkg+"client is stopping")
 	close(c.quitSend)
@@ -204,14 +204,14 @@ func (c *client) parse(buf []byte) {
 }
 
 // UpdateSequence will allow updating of the highest sequence number received
-// through an rtp stream.
+// through an RTP stream.
 func (c *client) UpdateSequence(s uint32) {
 	c.mu.Lock()
 	c.sequence = s
 	c.mu.Unlock()
 }
 
-// highestSequence will return the highest sequence number received through rtp.
+// highestSequence will return the highest sequence number received through RTP.
 func (c *client) highestSequence() uint32 {
 	var s uint32
 	c.mu.Lock()

protocol/rtcp/client_test.go

@@ -15,6 +15,7 @@ import (
 
 // TestFromPayload checks that formPayload is working as expected.
 func TestFormPayload(t *testing.T) {
+	// Expected data from a valid RTCP packet.
 	expect := []byte{
 		0x81, 0xc9, 0x00, 0x07,
 		0xd6, 0xe0, 0x98, 0xda,