blobs not pushed

[mixmix]

scenario

1. lone peer runs blobs.push
2. they then connect to e.g. a pub and establish reciprocal follow
3. the remote peer (e.g. pub) does not get the blob

Subsequent blobs go through fine.
Sometimes that initially pushed blob will turn up on pub but quite often not. Peers on the other side of the pub will likewise not get the blob because the pub doesn't have it

[mixmix]

I think this might be resolved when #37 has addressed?
We shall see