newbie vs access control

We're experimenting with moving our CVS repository to svn. That seems to go well
after I hacked the script to look at the cvs -kb flag.

I have a couple of questions related to access control.

First off I don't really understand example 6.3. Is it authz_svn_module &
AuthzSVNAccessFile that triggers a username request? Can I also require that a
valid group be obtained? Are the group names from my AuthGroupFile usable inside
AuthzSVNAccessFile?

Secondly is there any way to control access within a repository using apache
Location & Rewrite?

Is there any way to decide if the repository should be open by default or closed?

-- 
Robin Becker
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