curl: change the struct getout flags field into bitfields

As the flags were use mostly as individual booleans anyway, the code
gets simpler when we use bitfields instead of manual bitwise operations.

Closes #17436

src/tool_paramhlp.c

@@ -52,7 +52,7 @@ struct getout *new_getout(struct OperationConfig *config)
     /* move the last pointer */
     config->url_last = node;
 
-    node->flags = config->default_node_flags;
+    node->useremote = config->remote_name_all;
     node->num = outnum++;
   }
   return node;