Hey Josh,
I found the message I was seeing. It was/is(?) in StartRestoreBlob() and it
looks like this:
ahlog(AH, 2, "restoring large object with OID %u\n", oid);
But I don't know how to find it in the current git tree or how to activate
it from the command-line (assuming it is still part of the release).
Bosco.