* create get_service_node_list rpc call
currently does nothing, just a shell (that compiles)
* implement get_all_service_node_keys rpc call
* change get_all_service_node_keys rpc to use json rpc
also change the result to be vector of hex strings rather than binary keys
* Make nodes be plural, add hex to base32z for keys
Base32z for Lokinet internal usage
* Add option to return fully funded service nodes only
* Add nullptr check for conversion
* Add assert for incorrect usage of to base32z
- Difficulty fix to prevent 0 difficulty which is not considered valid.
- CURRENT_BLOCK_MAJOR/MINOR_VERSION is only used for tests it appears
- Core Tests generate a blockchain using the nettype FAKECHAIN, so some
codepaths need to accept FAKECHAIN as a nettype. FAKECHAIN is essentially the
mainnet.
- Core Tests uses their own hard-fork data that specifies the current hard-fork
version and time it forked etc instead of using the data in blockchain.cpp at
the top. We started from v7, so get_test_options() is updated accordingly.
