Disconnect client on shutdown.
Disconnect client on shutdown.

ppcsuite/ppcd,wallclockbuilder/btcd,davecgh/btcrpcclient,dajohi/btcd,aakselrod/btcd,davecgh/btcd,aakselrod/btcrpcclient,jrick/btcd,Stash-Crypto/btcd,wallclockbuilder/btcrpcclient,Roasbeef/btcd,aakselrod/btcd,aakselrod/btcrpcclient,tb00/btcd,btcsuite/btcrpcclient,btcsuite/btcrpcclient,decred/dcrd,dajohi/btcd,ltcsuite/ltcd,wallclockbuilder/btcrpcclient,btcsuite/btcd,jrick/btcrpcclient,jrick/dcrd,btcsuite/btcd,ppcsuite/btcrpcclient,tb00/btcd,ltcsuite/ltcd,Stash-Crypto/btcd,ppcsuite/ppcd,ppcsuite/btcrpcclient,jrick/dcrd,dajohi/btcd,FactomProject/btcrpcclient,jrick/btcd,runeaune/btcrpcclient,jrick/btcd,Roasbeef/btcd,runeaune/btcrpcclient,wallclockbuilder/btcd,davecgh/btcd,decred/dcrd,jrick/btcrpcclient,FactomProject/btcrpcclient