WIP patch for Oid formatting in printf/elog strings

I found a few places in the code where a variable of
type Oid is printed using "%d" rather than "%u" and
changed them in the attached patch.

In src/backend/replication/logical/reorderbuffer.c,

circa line 2494, chunk_seq is of type Oid, but
ent->last_chunk_seq is of type int32, leading me
to question if perhaps the use of %d for chunk_seq
is correct, but the use of Oid for the type of chunk_seq
is in error.  If neither is in error, perhaps someone
can provide a short code comment explaining the
logic of the signed/unsigned discrepancy.

Thanks,

Mark Dilger