Can rsync server mark deleted source files as extraneous?

[Wolfram Volpi]

rsync --delete option tells rsync to delete extraneous files from the receiving side (ones that aren't on the sending side).But if a user accidentally deletes a file, there is no way to restore it from the server.If --delete option is not used, and the local hard disk is destroyed, restored data will include old deleted files.
Is there a way for rsync server to retain backup of deleted source files, and mark them as extraneous?That way a directory can be restored from backup, excluding the old deleted files.
It could work something like this:
    when rsync server notices an unmarked extraneous file, it timestamps and marks the file as extraneous.    rsync server periodically deletes extraneous files like this        if (extraneous_mark == true and timestamp > current_date - age), then delete the file    where age is number of days extraneous files are retained.        rsync client can restore deleted files from server.    rsync client can restore directory from server, excluding extraneous files. 
Thank you,Wolfram Volpi
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