Read RPC username/pass from correct config file for btcctl defaults.
Read RPC username/pass from correct config file for btcctl defaults.

If no existing btcctl.conf file exists, btcctl creates a default one
using the RPC username and password from the btcd.conf. If the
--wallet flag is passed, however, it should read from btcwallet.conf
instead.

https://github.com/btcsuite/btcd/issues/875.

tb00/btcd,Roasbeef/btcd,davecgh/btcd,aakselrod/btcd,wallclockbuilder/btcd,aakselrod/btcd,dajohi/btcd,ppcsuite/ppcd,btcsuite/btcd,ltcsuite/ltcd,btcsuite/btcd,Stash-Crypto/btcd,ltcsuite/ltcd,Stash-Crypto/btcd,dajohi/btcd,davecgh/btcd,Roasbeef/btcd,ppcsuite/ppcd,wallclockbuilder/btcd,dajohi/btcd,tb00/btcd