Make -regtest CLI option visible
Since !214 (merged), the help text of several visible command-line options
describe regtest defaults, but the command-line option to start regtest
is hidden. Hence this MR makes -regtest
visible too (i.e. without the
need to pass --help-debug
).
Test plan: src/bitcoind -?
; chain selection options category should
now no longer only contain -testnet
but also -regtest
.