relative path not used when exporting p.a.redirector rules

[djay]

rules are exported with the full path. When they are imported they won't match unless the absolute path happens to be the same.

I suspect this is because p.a.redirector actually stores them as absolute paths but not sure. Either way, exportimport should export them in a form that the imports will work.

[pbauer]

The source should be exported without portal-id and the target as uuid. The import should then adapt these to the expected format. Also in new version the format is actually old_path, new_path, timestamp, manual (bool). Pull-requests are most welcome.