fa9b48549c test: Add test for -blockversion (MarcoFalke)
fa7fb0e442 test: Default blockversion to 4 in feature_block (MarcoFalke)
fa2b778d0c test: Remove unused -blockversion from tests (MarcoFalke)
Pull request description:
`-blockversion` is currently untested, as in: The setting could be made a no-op without any tests failing. Fix that by adding an explicit test for it. Also, related minor cleanups.
ACKs for top commit:
guggero:
ACK fa9b48549c.
Tree-SHA512: 1b2e792f7ed0ec1db163476ee8a938f8f7cb3691f797c721bbe55fdeed92487c2ff83b55467440096917999406c86430cb3a615383cefb4f621828309ff6a1e7