Ignore config in current directory by default.
Ignore config in current directory by default.

Fixes #415.

btcsuite/btcwallet,jrick/btcwallet,jrick/dcrwallet,jrick/btcwallet,Stash-Crypto/btcwallet,decred/dcrwallet,synrg-labs/btcwallet,Roasbeef/btcwallet,Stash-Crypto/btcwallet,Roasbeef/btcwallet,synrg-labs/btcwallet,decred/dcrwallet,btcsuite/btcwallet,jrick/dcrwallet