| * SVN changesets properties. Although the plugin uses the Trac VC abstraction
| layer to access repository information, the plugin still need a direct
| access to the underlying SVN repository to retrieve revision properties.
| There is a ticket ([t:ticket:2545 #2545]) to augment the abstraction layer
| with the support for revision properties which has been implemented for
| [t:milestone:0.11 0.11]. Until the plugin is adapted to support this new
| version of Trac, this direct access to the underlying repository prevents
| from switching from one repository kind to another.