Allow first cmpctblock received to be processed (rather than first requested).
Allow first cmpctblock received to be processed (rather than first
requested).

Speeds up block propagation as avoids an unncessary wait for the first
requested cmpctblock and instead allows cmpctblocks sent as announcement
to be processed when they arrive before the requested cmpctblock.

Fixes 9242

rebroad/bitcoin,rebroad/bitcoin,rebroad/bitcoin,rebroad/bitcoin,rebroad/bitcoin,rebroad/bitcoin