Using hdup 2.0.0

I'm trying to work out exactly how the new exclude mechanism works.  The
following seem to be true, I wonder if they are intentional and will
continue to work this way?

A / or ^ at the start of an exclude expression forces it to match at the
root of the filesystem.  There isn't a way to match at the root of the
directory tree being backed up.

The filename can be a partial match -- for instance, the exclude regexp
"evolution/cache"  will match the filename
"/home/boris/.evolution/cache"; so will the regexp "lution.ca" .

Following from the previous observations, if you want to match just
"evolution" and not ".evolution", I think you'd have to use something
like [^.]evolution, since /evolution would force the match to the root
directory.

It would be great to get some of the rules and examples into the man
page at some point.

Bng