Tool for upgrading many svn repos with dump/load?

Hi all,

are you aware of any tool that is able to upgrade many SVN repos by
creating a new empty default repo, dump a corresponding old repo, load
that dump into the new one AND is able to MERGE the configuration? I
have some dozen repos hosted by svnserve with independent realms,
users, authz rules and such. This configuration could be just copied,
but I would prefer merged default configs for documentation purpose
and such.

I've created something similar in the past using Powershell, but
without the merge stuff and it just don't work on our now used Ubuntu
servers. Before I roll my own new script, I wanted to make sure that I
don't miss anything because I didn't found something mentioned on the
net.

Thanks!

Mit freundlichen Grüßen,

Thorsten Schöning

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