Second beta release for the Genesis release. Testers are encouraged to upgrade to this version of the software.

List of changes since beta1

Parallel Block Validation.
Enhance tests for Parallel Block Validation.
Common Genesis activation code and command line option.
Uncomment parts of functional tests that was depended on other now complete code.
Enable validation of non-standard txns (on MainNet) when Genesis is enabled.
Set mempool default = 1Gb.
Remove block size from user agent string .
Change default tx fees (default txfee = 0.5 sat/byte, default minrelaytxfee = 0.25 sat/byte)
Update SPV bloom filters re attack mitigation.
Rename acceptp2sh to acceptp2sh_ashashpuzzle.
Improve performance of prevector deserialization.
Remove the limit on the number of CHECKSIGS per MB of block space.
Provide unit tests for LimitedStack/vector.
Change logging messages to be more precise.

Fix: Validating non-standard transactions can lock up a node for more than a minute.
Fix: Tx validation uses original reject message and ban score is used
Fix block send queue overflow
Fix undefined behaviour in bsv::deserialize
Fix bitcoin-cli help getblock
Fix build: Configure should fail when it can’t detect boost
Set the execute bit on all the new Genesis functional tests.
Fix MedianTimePast
Fix: Nonfinal transactions with no inputs is rejected with incorrect reason.
Fix memory leak in asn1_integer
Fix boost::optional warnings
Fix: When validating mempool transactions, a reject message is sent if the high priority queue times out.
Fix: hexhdr.py does not get included in packaged source

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