Since they are not real opcodes, being reported as OP_UNKNOWN is less confusing for human-readable decoding.
Signed-off-by: Huang Le <4tarhl@gmail.com>
NodeSyncScore() should find the node which we recv data most recently, so put a negative sign to pnode->nLastRecv is indeed wrong.
Also change the return value type to int64_t.
Signed-off-by: Huang Le <4tarhl@gmail.com>