Found and altered the one place in the code that might explain
these infrequent and weird loglines I'm seeing sometimes in
the payments.error log (in production).
If this changes things: Transactions that hit this block get stuck
until they are manually unstuck. Teach orphans.php how to handle
them for real.

Change-Id: I69b252529aaa8ee075351c049fea9abd59e9174e