We wait until the chain is synched and then we check for and broadcast
unconfirmed transactions.
This essentially means that every single block we receive will trigger
this code. In BCH I think that is just fine since all we really do is
send an INV.
The code to re-org all transactions in a block so transactions that
depend on others are processed after those they depend on had a silly
bug (missing line), fixed that but also made it unit-testable to
demonstrate the bug.
TomZ