Fix comment and error name

Co-authored-by: Eric Daniels <eric@erdaniels.com>

gather.go

@@ -604,7 +604,7 @@ func (a *Agent) gatherCandidatesRelay(ctx context.Context, urls []*URL) { //noli
 
 				udpConn, dialErr := a.net.DialUDP("udp", nil, udpAddr)
 				if dialErr != nil {
-					a.log.Warnf("Failed to dial DTLS Address %s: %v", TURNServerAddr, connectErr)
+					a.log.Warnf("Failed to dial DTLS Address %s: %v", TURNServerAddr, dialErr)
 					return
 				}
 

udp_mux_multi.go

@@ -218,7 +218,7 @@ func UDPMuxFromPortWithLoopback() UDPMuxFromPortOption {
 	}
 }
 
-// UDPMuxFromPortWithNet set loopback interface should be included
+// UDPMuxFromPortWithNet sets the network transport to use.
 func UDPMuxFromPortWithNet(n transport.Net) UDPMuxFromPortOption {
 	return &udpMuxFromPortOption{
 		f: func(p *multiUDPMuxFromPortParam) {