Option to not follow symlinks / stay on one filesystem

[vi]

-x should have been "stay on one filesystem" instead of "exclude", for parity with du and ncdu.

Anyway, there should be something like -X then to avoid going to other filesystems mounted below this one and options to avoid following symlinks (or maybe it should not follow symlinks by default unless -L).

[nachoparker]

Hello

By default it doesn't follow symlinks. PRs are welcome