python3: enforce byte prefix for vfs.open() Changeset ea8da5aa23c6e723d7f0006387a1a20eef58fc9a added raw prefix to open(), but also to vfs.open(). The latter only handles bytestring arguments.

test-drop.t
test-inhibit.t
test-simple4server.t
tests/test-simple4server-bundle2.t