Tighten up some serialization checks
Restore checkpointed ledger under all paths in PathFind.
Use swapWith to save CPU; edit comment.
In JSON, output unprintable currency codes as hex
Set version to 0.25.2-rc2
Impose a local limit on path lengths
Find 'sabfd' paths
This permits USD/GW1 to be bridged to USD/GW2 by BTC/GW3 or
USD/GW1 to be bridged to BTC/GW2 by CNY/GW3. See RIPD-335.
Set version to 0.25.2