Fix a couple of comment typos for the word execute.
Fix a couple of comment typos for the word execute.

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