Don't make "paths to exclude" absolute relative to path

Issue Summary

If I put the string "excluded" in the box, I'd like to exclude any file/folder trees from that point down anywhere in the filesystem.

files/excluded would of course work as it does now

but I want:

files/theme-images/excluded

and

files /node-decoration/excluded

to also be excluded.

Right now I have to delete thousands of lines from the report output using regex to see the ones that are "really" orphans

If necessary make it a separate field or make it a radio button option, or give this case a different syntax?

But I think just changing the behaviour of the code and leaving the form alone would work. . .