mod_dontdothat does not restrict requests from serf based clients
mod_dontdothat allows you to block update REPORT requests against certain
paths in the repository. It expects the paths in the REPORT request
to be absolute URLs. Serf based clients send relative URLs instead
of absolute URLs in many cases. As a result these clients are not blocked
as configured by mod_dontdothat.
mod_dav_svn assertion triggered by non-canonical URLs in autoversioning commits
When SVNAutoversioning is enabled via SVNAutoversioning on
commits can be made by single HTTP requests such as MKCOL and
PUT. If Subversion is built with assertions enabled any such
requests that have non-canonical URLs, such as URLs with a
trailing /, may trigger an assert. An assert will cause the
Apache process to abort.