lnd: Add CORS support to the WalletUnlocker proxy

This commit adds the same CORS functionality that's currently in the main gRPC proxy to the WalletUnlocker proxy. This ensures the CORS configuration is carried through all API endpoints

lnd.go

@@ -1011,7 +1011,7 @@ func waitForWalletPassword(cfg *Config, restEndpoints []net.Addr,
 		return nil, err
 	}
 
-	srv := &http.Server{Handler: mux}
+	srv := &http.Server{Handler: allowCORS(mux, cfg.RestCORS)}
 
 	for _, restEndpoint := range restEndpoints {
 		lis, err := lncfg.TLSListenOnAddress(restEndpoint, tlsConf)