Fix some typos in comments and error messages (found by codespell)

Signed-off-by: Stefan Weil <sw@weilnetz.de>

src/signaling/api_signaling.go

@@ -249,7 +249,7 @@ func (m *HelloClientMessage) CheckValid() error {
 				return err
 			}
 		default:
-			return fmt.Errorf("unsupport auth type")
+			return fmt.Errorf("unsupported auth type")
 		}
 	}
 	return nil

src/signaling/hub.go

@@ -733,7 +733,7 @@ func (h *Hub) processHello(client *Client, message *ClientMessage) {
 		return
 	}
 
-	// Make sure client doesn't get disconencted while calling auth backend.
+	// Make sure client doesn't get disconnected while calling auth backend.
 	h.mu.Lock()
 	delete(h.expectHelloClients, client)
 	h.mu.Unlock()

src/signaling/janus_client.go

@@ -234,7 +234,7 @@ type JanusGateway struct {
 	Sessions map[uint64]*JanusSession
 
 	// Access to the Sessions map should be synchronized with the Gateway.Lock()
-	// and Gateway.Unlock() methods provided by the embeded sync.Mutex.
+	// and Gateway.Unlock() methods provided by the embedded sync.Mutex.
 	sync.Mutex
 
 	conn         *websocket.Conn
@@ -578,7 +578,7 @@ type JanusSession struct {
 	Handles map[uint64]*JanusHandle
 
 	// Access to the Handles map should be synchronized with the Session.Lock()
-	// and Session.Unlock() methods provided by the embeded sync.Mutex.
+	// and Session.Unlock() methods provided by the embedded sync.Mutex.
 	sync.Mutex
 
 	gateway *JanusGateway

src/signaling/mcu_janus.go

@@ -1039,7 +1039,7 @@ retry:
 			case msg := <-wakeupChan:
 				var message NatsMessage
 				if err := p.mcu.nats.Decode(msg, &message); err != nil {
-					log.Printf("Error decoding wakup NATS message %s (%s)\n", string(msg.Data), err)
+					log.Printf("Error decoding wakeup NATS message %s (%s)\n", string(msg.Data), err)
 					goto wait
 				} else if message.Type != "connected" {
 					log.Printf("Unsupported NATS message waiting for publisher %s: %+v\n", p.publisher, message)