Fix some doc typos (from oga@)
Fix some doc typos (from oga@)

jrick/btcd,btcsuite/btcd,aakselrod/btcd,cjepson/btcd,hectorj/btcd,CryptocurrencyCabal/htcd,cjepson/btcd,BitGo/prova,ppcsuite/ppcd-old,dajohi/btcd,Stash-Crypto/btcd,pkothbauer/btcd,ltcsuite/ltcd,jrick/dcrd,toddfries/btcd,stevenroose/btcd,mathiasrw/btcd,davecgh/btcd,DanielKrawisz/btcd,dan-da/btcd,glv2/ppcd,BitGo/prova,danoctavian/btcd,Cleawing/btcd,Roasbeef/btcd,jrick/btcd,Dirbaio/btcd,qchain/btcd,cqswxj2013/btcd,ppcsuite/ppcd,adiabat/btcd,Cleawing/btcd,pkothbauer/btcd,ltcsuite/ltcd,tb00/btcd,qchain/btcd,cqswxj2013/btcd,btcsuitereleases/btcd,decred/dcrd,1d4Nf6/btcd,wallclockbuilder/btcd,decred/dcrd,aakselrod/btcd,jrick/btcd,1d4Nf6/btcd,runeaune/btcd,jimmysong/btcd,runeaune/btcd,soapboxsys/ombfullnode,Roasbeef/btcd,sysbot/btcjson,Dirbaio/btcd,btcsuite/btcd,CryptocurrencyCabal/htcd,sysbot/btcjson,jongillham/btcd,jcmincke/dcrd,jcmincke/dcrd,btcsuitereleases/btcd,DanielKrawisz/btcd,stevenroose/btcd,soapboxsys/ombfullnode,tb00/btcd,ppcsuite/ppcd-old,toddfries/btcd,dajohi/btcd,adiabat/btcd,Dirbaio/btcd,hectorj/btcd,Stash-Crypto/btcd,dajohi/btcd,dan-da/btcd,jongillham/btcd,ppcsuite/ppcd,glv2/ppcd,danoctavian/btcd,wallclockbuilder/btcd,davecgh/btcd,mathiasrw/btcd,jrick/dcrd,jimmysong/btcd,jcmincke/dcrd