walk: fix listing with filters listing whole remote

Prior to this fix, a request such as

    rclone lsf -R --include "/dir/**" remote:

Would use ListR which is very inefficient as it lists the whole remote
for one directory.

This changes it to use recursive walking if the filters imply any
directory filtering.  So `--include *.jpg` and `--exclude *.jpg` will
still use ListR wheras `--include "/dir/**` will not.

fs/walk/walk.go

@@ -51,7 +51,7 @@ type Func func(path string, entries fs.DirEntries, err error) error
 //
 // Parent directories are always listed before their children
 //
-// This is implemented by WalkR if Config.UseUseListR is true
+// This is implemented by WalkR if Config.UseListR is true
 // and f supports it and level > 1, or WalkN otherwise.
 //
 // If --files-from and --no-traverse is set then a DirTree will be
@@ -146,7 +146,7 @@ func ListR(ctx context.Context, f fs.Fs, path string, includeAll bool, maxLevel
 		filter.Active.HaveFilesFrom() || // ...using --files-from
 		maxLevel >= 0 || // ...using bounded recursion
 		len(filter.Active.Opt.ExcludeFile) > 0 || // ...using --exclude-file
-		filter.Active.BoundedRecursion() { // ...filters imply bounded recursion
+		filter.Active.UsesDirectoryFilters() { // ...using any directory filters
 		return listRwalk(ctx, f, path, includeAll, maxLevel, listType, fn)
 	}
 	return listR(ctx, f, path, includeAll, listType, fn, doListR, listType.Dirs() && f.Features().BucketBased)