Docs: Fix help message typo optiona -> optional
Docs: Fix help message typo optiona -> optional

anditto/bitcoin,ahmedbodi/vertcoin,ericshawlinux/bitcoin,ElementsProject/elements,litecoin-project/litecoin,untrustbank/litecoin,Sjors/bitcoin,droark/bitcoin,jamesob/bitcoin,GlobalBoost/GlobalBoost,andreaskern/bitcoin,monacoinproject/monacoin,droark/bitcoin,midnightmagic/bitcoin,AkioNak/bitcoin,fanquake/bitcoin,rnicoll/bitcoin,sipsorcery/bitcoin,practicalswift/bitcoin,namecoin/namecoin-core,JeremyRubin/bitcoin,fanquake/bitcoin,sstone/bitcoin,RHavar/bitcoin,achow101/bitcoin,untrustbank/litecoin,myriadcoin/myriadcoin,bitcoin/bitcoin,tecnovert/particl-core,Xekyo/bitcoin,mitchellcash/bitcoin,nikkitan/bitcoin,jonasschnelli/bitcoin,FeatherCoin/Feathercoin,qtumproject/qtum,nikkitan/bitcoin,jnewbery/bitcoin,ahmedbodi/vertcoin,peercoin/peercoin,EthanHeilman/bitcoin,alecalve/bitcoin,midnightmagic/bitcoin,mitchellcash/bitcoin,afk11/bitcoin,bitcoinsSG/bitcoin,mitchellcash/bitcoin,lateminer/bitcoin,bespike/litecoin,droark/bitcoin,mruddy/bitcoin,n1bor/bitcoin,vertcoin/vertcoin,Flowdalic/bitcoin,Kogser/bitcoin,Xekyo/bitcoin,domob1812/bitcoin,wellenreiter01/Feathercoin,ericshawlinux/bitcoin,peercoin/peercoin,peercoin/peercoin,kallewoof/bitcoin,Flowdalic/bitcoin,Christewart/bitcoin,OmniLayer/omnicore,jtimon/bitcoin,domob1812/bitcoin,GroestlCoin/bitcoin,domob1812/bitcoin,mm-s/bitcoin,domob1812/namecore,practicalswift/bitcoin,instagibbs/bitcoin,myriadcoin/myriadcoin,MeshCollider/bitcoin,DigitalPandacoin/pandacoin,GlobalBoost/GlobalBoost,tjps/bitcoin,cdecker/bitcoin,yenliangl/bitcoin,OmniLayer/omnicore,mruddy/bitcoin,CryptArc/bitcoin,DigitalPandacoin/pandacoin,n1bor/bitcoin,wellenreiter01/Feathercoin,yenliangl/bitcoin,vertcoin/vertcoin,midnightmagic/bitcoin,RHavar/bitcoin,jamesob/bitcoin,OmniLayer/omnicore,namecoin/namecoin-core,MarcoFalke/bitcoin,afk11/bitcoin,ahmedbodi/vertcoin,bespike/litecoin,dscotese/bitcoin,cdecker/bitcoin,yenliangl/bitcoin,lateminer/bitcoin,alecalve/bitcoin,GroestlCoin/GroestlCoin,Sjors/bitcoin,andreaskern/bitcoin,GroestlCoin/bitcoin,practicalswift/bitcoin,bitcoinsSG/bitcoin,bespike/litecoin,bitcoin/bitcoin,jambolo/bitcoin,jonasschnelli/bitcoin,namecoin/namecoin-core,GroestlCoin/bitcoin,kazcw/bitcoin,r8921039/bitcoin,jnewbery/bitcoin,gjhiggins/vcoincore,jamesob/bitcoin,kazcw/bitcoin,jnewbery/bitcoin,cdecker/bitcoin,Kogser/bitcoin,afk11/bitcoin,bitcoinknots/bitcoin,nikkitan/bitcoin,jambolo/bitcoin,Flowdalic/bitcoin,gjhiggins/vcoincore,instagibbs/bitcoin,jnewbery/bitcoin,GroestlCoin/GroestlCoin,prusnak/bitcoin,andreaskern/bitcoin,tecnovert/particl-core,EthanHeilman/bitcoin,fujicoin/fujicoin,GlobalBoost/GlobalBoost,qtumproject/qtum,GroestlCoin/GroestlCoin,tecnovert/particl-core,cdecker/bitcoin,prusnak/bitcoin,wellenreiter01/Feathercoin,wellenreiter01/Feathercoin,jamesob/bitcoin,Sjors/bitcoin,particl/particl-core,sstone/bitcoin,myriadcoin/myriadcoin,Christewart/bitcoin,bitcoin/bitcoin,jambolo/bitcoin,RHavar/bitcoin,GlobalBoost/GlobalBoost,kazcw/bitcoin,r8921039/bitcoin,fanquake/bitcoin,GlobalBoost/GlobalBoost,mruddy/bitcoin,ElementsProject/elements,OmniLayer/omnicore,RHavar/bitcoin,rnicoll/bitcoin,pataquets/namecoin-core,litecoin-project/litecoin,Christewart/bitcoin,bitcoinsSG/bitcoin,jtimon/bitcoin,pstratem/bitcoin,namecoin/namecore,bitcoinknots/bitcoin,anditto/bitcoin,bitcoinknots/bitcoin,MeshCollider/bitcoin,myriadcoin/myriadcoin,ElementsProject/elements,GroestlCoin/bitcoin,RHavar/bitcoin,sipsorcery/bitcoin,MarcoFalke/bitcoin,alecalve/bitcoin,Kogser/bitcoin,ajtowns/bitcoin,JeremyRubin/bitcoin,kazcw/bitcoin,CryptArc/bitcoin,Flowdalic/bitcoin,DigitalPandacoin/pandacoin,MarcoFalke/bitcoin,peercoin/peercoin,untrustbank/litecoin,anditto/bitcoin,anditto/bitcoin,pataquets/namecoin-core,ElementsProject/elements,dscotese/bitcoin,lateminer/bitcoin,particl/particl-core,myriadteam/myriadcoin,GroestlCoin/bitcoin,MeshCollider/bitcoin,mruddy/bitcoin,jamesob/bitcoin,kazcw/bitcoin,CryptArc/bitcoin,fujicoin/fujicoin,vertcoin/vertcoin,Kogser/bitcoin,CryptArc/bitcoin,vertcoin/vertcoin,achow101/bitcoin,DigitalPandacoin/pandacoin,andreaskern/bitcoin,Kogser/bitcoin,jtimon/bitcoin,fujicoin/fujicoin,ahmedbodi/vertcoin,ahmedbodi/vertcoin,rnicoll/dogecoin,jonasschnelli/bitcoin,alecalve/bitcoin,bitcoinsSG/bitcoin,litecoin-project/litecoin,afk11/bitcoin,practicalswift/bitcoin,jtimon/bitcoin,jonasschnelli/bitcoin,dscotese/bitcoin,jlopp/statoshi,monacoinproject/monacoin,monacoinproject/monacoin,mm-s/bitcoin,domob1812/namecore,kazcw/bitcoin,sipsorcery/bitcoin,wellenreiter01/Feathercoin,tecnovert/particl-core,fujicoin/fujicoin,jonasschnelli/bitcoin,domob1812/namecore,rnicoll/dogecoin,qtumproject/qtum,monacoinproject/monacoin,FeatherCoin/Feathercoin,CryptArc/bitcoin,pataquets/namecoin-core,monacoinproject/monacoin,AkioNak/bitcoin,AkioNak/bitcoin,Kogser/bitcoin,rnicoll/bitcoin,nikkitan/bitcoin,jambolo/bitcoin,JeremyRubin/bitcoin,midnightmagic/bitcoin,vertcoin/vertcoin,rnicoll/bitcoin,FeatherCoin/Feathercoin,jlopp/statoshi,MeshCollider/bitcoin,EthanHeilman/bitcoin,n1bor/bitcoin,MarcoFalke/bitcoin,sipsorcery/bitcoin,namecoin/namecoin-core,FeatherCoin/Feathercoin,gjhiggins/vcoincore,apoelstra/bitcoin,sstone/bitcoin,practicalswift/bitcoin,Christewart/bitcoin,domob1812/bitcoin,mitchellcash/bitcoin,mitchellcash/bitcoin,DigitalPandacoin/pandacoin,bitcoin/bitcoin,Kogser/bitcoin,dscotese/bitcoin,EthanHeilman/bitcoin,apoelstra/bitcoin,andreaskern/bitcoin,GroestlCoin/GroestlCoin,afk11/bitcoin,litecoin-project/litecoin,namecoin/namecore,instagibbs/bitcoin,practicalswift/bitcoin,AkioNak/bitcoin,OmniLayer/omnicore,Xekyo/bitcoin,qtumproject/qtum,ahmedbodi/vertcoin,apoelstra/bitcoin,litecoin-project/litecoin,mitchellcash/bitcoin,MeshCollider/bitcoin,pstratem/bitcoin,bitcoin/bitcoin,prusnak/bitcoin,tecnovert/particl-core,rnicoll/dogecoin,ajtowns/bitcoin,Christewart/bitcoin,n1bor/bitcoin,jlopp/statoshi,Kogser/bitcoin,AkioNak/bitcoin,Sjors/bitcoin,anditto/bitcoin,r8921039/bitcoin,sipsorcery/bitcoin,FeatherCoin/Feathercoin,pstratem/bitcoin,domob1812/namecore,Kogser/bitcoin,instagibbs/bitcoin,Flowdalic/bitcoin,alecalve/bitcoin,lateminer/bitcoin,pstratem/bitcoin,namecoin/namecoin-core,pstratem/bitcoin,midnightmagic/bitcoin,kallewoof/bitcoin,achow101/bitcoin,pataquets/namecoin-core,Kogser/bitcoin,tjps/bitcoin,pataquets/namecoin-core,namecoin/namecore,vertcoin/vertcoin,domob1812/namecore,fanquake/bitcoin,prusnak/bitcoin,myriadteam/myriadcoin,ericshawlinux/bitcoin,qtumproject/qtum,ajtowns/bitcoin,fanquake/bitcoin,Xekyo/bitcoin,JeremyRubin/bitcoin,prusnak/bitcoin,GroestlCoin/GroestlCoin,ElementsProject/elements,sstone/bitcoin,kallewoof/bitcoin,ericshawlinux/bitcoin,instagibbs/bitcoin,mm-s/bitcoin,domob1812/bitcoin,untrustbank/litecoin,r8921039/bitcoin,kallewoof/bitcoin,gjhiggins/vcoincore,fujicoin/fujicoin,litecoin-project/litecoin,instagibbs/bitcoin,rnicoll/dogecoin,jambolo/bitcoin,GlobalBoost/GlobalBoost,bespike/litecoin,FeatherCoin/Feathercoin,jtimon/bitcoin,kallewoof/bitcoin,mm-s/bitcoin,mm-s/bitcoin,achow101/bitcoin,alecalve/bitcoin,myriadteam/myriadcoin,andreaskern/bitcoin,EthanHeilman/bitcoin,prusnak/bitcoin,particl/particl-core,GroestlCoin/GroestlCoin,achow101/bitcoin,r8921039/bitcoin,mruddy/bitcoin,lateminer/bitcoin,namecoin/namecore,MarcoFalke/bitcoin,JeremyRubin/bitcoin,apoelstra/bitcoin,tjps/bitcoin,MarcoFalke/bitcoin,afk11/bitcoin,pataquets/namecoin-core,particl/particl-core,untrustbank/litecoin,jlopp/statoshi,mm-s/bitcoin,qtumproject/qtum,EthanHeilman/bitcoin,JeremyRubin/bitcoin,cdecker/bitcoin,DigitalPandacoin/pandacoin,dscotese/bitcoin,namecoin/namecore,Xekyo/bitcoin,bitcoinknots/bitcoin,bitcoin/bitcoin,nikkitan/bitcoin,GroestlCoin/bitcoin,fanquake/bitcoin,qtumproject/qtum,n1bor/bitcoin,ericshawlinux/bitcoin,particl/particl-core,tjps/bitcoin,domob1812/bitcoin,gjhiggins/vcoincore,Kogser/bitcoin,dscotese/bitcoin,achow101/bitcoin,lateminer/bitcoin,yenliangl/bitcoin,ajtowns/bitcoin,n1bor/bitcoin,ajtowns/bitcoin,sstone/bitcoin,Flowdalic/bitcoin,sstone/bitcoin,jnewbery/bitcoin,ericshawlinux/bitcoin,Christewart/bitcoin,namecoin/namecore,Kogser/bitcoin,RHavar/bitcoin,peercoin/peercoin,tjps/bitcoin,AkioNak/bitcoin,bitcoinsSG/bitcoin,monacoinproject/monacoin,ElementsProject/elements,rnicoll/bitcoin,ajtowns/bitcoin,mruddy/bitcoin,droark/bitcoin,jlopp/statoshi,sipsorcery/bitcoin,jamesob/bitcoin,pstratem/bitcoin,yenliangl/bitcoin,tecnovert/particl-core,cdecker/bitcoin,Sjors/bitcoin,gjhiggins/vcoincore,apoelstra/bitcoin,myriadteam/myriadcoin,jtimon/bitcoin,Xekyo/bitcoin,MeshCollider/bitcoin,untrustbank/litecoin,GlobalBoost/GlobalBoost,namecoin/namecoin-core,apoelstra/bitcoin,myriadteam/myriadcoin,OmniLayer/omnicore,domob1812/namecore,droark/bitcoin,bitcoinsSG/bitcoin,bitcoinknots/bitcoin,rnicoll/bitcoin,bespike/litecoin,particl/particl-core,droark/bitcoin,anditto/bitcoin,r8921039/bitcoin,tjps/bitcoin,nikkitan/bitcoin,bespike/litecoin,wellenreiter01/Feathercoin,peercoin/peercoin,rnicoll/dogecoin,myriadcoin/myriadcoin,CryptArc/bitcoin,myriadteam/myriadcoin,kallewoof/bitcoin,jlopp/statoshi,myriadcoin/myriadcoin,yenliangl/bitcoin,jambolo/bitcoin,midnightmagic/bitcoin,fujicoin/fujicoin