To fully comply with the binkp/1.1 (FSP-1024) spec, we need to rescan the
outbound after sending an M_EOB... this shouldn't actually be necessary
though since we're holding the .bsy lock the whole time, and nothing else
is allowed to add stuff (per FTS-5005).  This is mostly for FREQs, so once
the req handler is in there, I'll likely ignore this requirement.