It would be nice if ra_svn/svnserve had some form of path based authorization,
like mod_authz_svn provides when accessing repositories via Apache.
Access should be controlled on a per-user/per-group access with read and write
access controllable for each user/group.
This should use the same config files as mod_authz_svn unless there is a REALLY
good reason not to.
A useful extension to the abilities of mod_authz_svn that would probably be
possible to implement in ra_svn/svnserve would be the ability to specify that
sections of the tree are open to anonymous users, something which isn't
currently possible with mod_authz_svn.