git annex sync --content does not drop local unwanted content that has been transferred to an exporttree remote.

This normally doesn't matter since exporttree remotes are untrusted, but S3 with versioning enabled is not untrusted and once a file reaches such a remote it should be able to be dropped locally. --Joey

Actually, there are two bugs here, because sync --content also fails to drop local unwanted content that's got only 1 copy on another remote. It forgot to include the local copy as a currently present copy, throwing off the numcopies counting. --Joey

Both fixed --Joey