peer: Remove potential race when calling Connect.
peer: Remove potential race when calling Connect.

Roasbeef/btcd,jrick/btcd,davecgh/btcd,BitGo/prova,tb00/btcd,jrick/btcd,Stash-Crypto/btcd,Stash-Crypto/btcd,jongillham/btcd,jongillham/btcd,wallclockbuilder/btcd,dajohi/btcd,aakselrod/btcd,btcsuite/btcd,jcmincke/dcrd,ltcsuite/ltcd,cqswxj2013/btcd,ppcsuite/ppcd,tb00/btcd,BitGo/prova,stevenroose/btcd,adiabat/btcd,jrick/btcd,cqswxj2013/btcd,ltcsuite/ltcd,jrick/dcrd,dajohi/btcd,decred/dcrd,dajohi/btcd,adiabat/btcd,wallclockbuilder/btcd,btcsuite/btcd,Roasbeef/btcd,decred/dcrd,jcmincke/dcrd,ppcsuite/ppcd,davecgh/btcd,jcmincke/dcrd,stevenroose/btcd,jrick/dcrd,aakselrod/btcd