lnd: reload cert data after renewal

After renewing the certificate, the new certificate wasn't actually
loaded and used, causing the old one to be used until lnd was restarted.
This fixes that by reloading it after it has been written.

lnd.go

@@ -757,6 +757,12 @@ func getTLSConfig(tlsCertPath string, tlsKeyPath string, tlsExtraIPs,
 			return nil, nil, "", err
 		}
 		rpcsLog.Infof("Done renewing TLS certificates")
+
+		// Reload the certificate data.
+		certData, _, err = cert.LoadCert(tlsCertPath, tlsKeyPath)
+		if err != nil {
+			return nil, nil, "", err
+		}
 	}
 
 	tlsCfg := cert.TLSConfFromCert(certData)