1. remove lbcdusername and lbcdpassword
2. rename (username, password) to (rpcuser, rpcpass)
Most users are confused with the lbcduser and username at first,
and choose to use the same credentials between lbcd and lbcwallet.
1. Remove passphrase support for public keys.
2. Rename privPassphrase to passphrase to avoid confusion.
Note:
There has been a bug in the prompt, which prevents users from
specifying a custom public passphrase. So, most wallet databases
have been using the default password for the public keys, anyway.