docs: Update OpenBSD build instructions for OpenBSD 6.3
docs: Update OpenBSD build instructions for OpenBSD 6.3

sipsorcery/bitcoin,mitchellcash/bitcoin,domob1812/huntercore,bitcoin/bitcoin,Kogser/bitcoin,AkioNak/bitcoin,monacoinproject/monacoin,Xekyo/bitcoin,Flowdalic/bitcoin,mruddy/bitcoin,cdecker/bitcoin,Flowdalic/bitcoin,MarcoFalke/bitcoin,vertcoin/vertcoin,MarcoFalke/bitcoin,midnightmagic/bitcoin,guncoin/guncoin,mruddy/bitcoin,fanquake/bitcoin,randy-waterhouse/bitcoin,lateminer/bitcoin,jamesob/bitcoin,wellenreiter01/Feathercoin,ericshawlinux/bitcoin,untrustbank/litecoin,domob1812/bitcoin,particl/particl-core,pstratem/bitcoin,particl/particl-core,namecoin/namecore,nikkitan/bitcoin,tecnovert/particl-core,h4x3rotab/BTCGPU,dscotese/bitcoin,dscotese/bitcoin,wellenreiter01/Feathercoin,jtimon/bitcoin,gjhiggins/vcoincore,jlopp/statoshi,Christewart/bitcoin,jonasschnelli/bitcoin,domob1812/bitcoin,Bushstar/UFO-Project,prusnak/bitcoin,afk11/bitcoin,monacoinproject/monacoin,nikkitan/bitcoin,monacoinproject/monacoin,jtimon/bitcoin,AkioNak/bitcoin,ahmedbodi/vertcoin,GroestlCoin/bitcoin,anditto/bitcoin,apoelstra/bitcoin,EthanHeilman/bitcoin,FeatherCoin/Feathercoin,sstone/bitcoin,namecoin/namecore,Sjors/bitcoin,vmp32k/litecoin,midnightmagic/bitcoin,JeremyRubin/bitcoin,afk11/bitcoin,ajtowns/bitcoin,vertcoin/vertcoin,Xekyo/bitcoin,instagibbs/bitcoin,midnightmagic/bitcoin,bitcoinsSG/bitcoin,practicalswift/bitcoin,GroestlCoin/bitcoin,jambolo/bitcoin,ElementsProject/elements,instagibbs/bitcoin,jambolo/bitcoin,sstone/bitcoin,GroestlCoin/GroestlCoin,myriadteam/myriadcoin,vmp32k/litecoin,FeatherCoin/Feathercoin,myriadteam/myriadcoin,EthanHeilman/bitcoin,sstone/bitcoin,yenliangl/bitcoin,r8921039/bitcoin,jmcorgan/bitcoin,domob1812/huntercore,bitcoinsSG/bitcoin,thrasher-/litecoin,myriadcoin/myriadcoin,prusnak/bitcoin,RHavar/bitcoin,GlobalBoost/GlobalBoost,vmp32k/litecoin,EthanHeilman/bitcoin,fanquake/bitcoin,instagibbs/bitcoin,pstratem/bitcoin,n1bor/bitcoin,alecalve/bitcoin,cdecker/bitcoin,vmp32k/litecoin,ElementsProject/elements,nikkitan/bitcoin,andreaskern/bitcoin,GlobalBoost/GlobalBoost,namecoin/namecore,jtimon/bitcoin,mitchellcash/bitcoin,Flowdalic/bitcoin,kazcw/bitcoin,kazcw/bitcoin,andreaskern/bitcoin,sstone/bitcoin,CryptArc/bitcoin,jonasschnelli/bitcoin,n1bor/bitcoin,midnightmagic/bitcoin,GroestlCoin/bitcoin,tecnovert/particl-core,kallewoof/bitcoin,Kogser/bitcoin,anditto/bitcoin,domob1812/namecore,Kogser/bitcoin,ahmedbodi/vertcoin,Bushstar/UFO-Project,bitcoin/bitcoin,BTCGPU/BTCGPU,anditto/bitcoin,rawodb/bitcoin,digibyte/digibyte,Kogser/bitcoin,jlopp/statoshi,RHavar/bitcoin,monacoinproject/monacoin,instagibbs/bitcoin,sstone/bitcoin,DigitalPandacoin/pandacoin,h4x3rotab/BTCGPU,dscotese/bitcoin,bespike/litecoin,CryptArc/bitcoin,mm-s/bitcoin,OmniLayer/omnicore,vertcoin/vertcoin,mitchellcash/bitcoin,Kogser/bitcoin,namecoin/namecore,r8921039/bitcoin,rawodb/bitcoin,qtumproject/qtum,vertcoin/vertcoin,randy-waterhouse/bitcoin,sebrandon1/bitcoin,Xekyo/bitcoin,andreaskern/bitcoin,Bushstar/UFO-Project,jamesob/bitcoin,Kogser/bitcoin,jnewbery/bitcoin,untrustbank/litecoin,guncoin/guncoin,fujicoin/fujicoin,r8921039/bitcoin,droark/bitcoin,Kogser/bitcoin,rnicoll/bitcoin,litecoin-project/litecoin,jonasschnelli/bitcoin,myriadteam/myriadcoin,r8921039/bitcoin,peercoin/peercoin,CryptArc/bitcoin,fujicoin/fujicoin,Kogser/bitcoin,kazcw/bitcoin,sipsorcery/bitcoin,namecoin/namecore,domob1812/huntercore,Christewart/bitcoin,mm-s/bitcoin,guncoin/guncoin,tjps/bitcoin,myriadcoin/myriadcoin,bitcoinknots/bitcoin,RHavar/bitcoin,FeatherCoin/Feathercoin,sipsorcery/bitcoin,GlobalBoost/GlobalBoost,Sjors/bitcoin,bitcoin/bitcoin,untrustbank/litecoin,vertcoin/vertcoin,rawodb/bitcoin,nikkitan/bitcoin,randy-waterhouse/bitcoin,MeshCollider/bitcoin,lateminer/bitcoin,ajtowns/bitcoin,pataquets/namecoin-core,bespike/litecoin,thrasher-/litecoin,guncoin/guncoin,digibyte/digibyte,prusnak/bitcoin,n1bor/bitcoin,peercoin/peercoin,Flowdalic/bitcoin,GroestlCoin/GroestlCoin,jlopp/statoshi,joshrabinowitz/bitcoin,FeatherCoin/Feathercoin,droark/bitcoin,achow101/bitcoin,tjps/bitcoin,ericshawlinux/bitcoin,qtumproject/qtum,joshrabinowitz/bitcoin,GlobalBoost/GlobalBoost,Xekyo/bitcoin,droark/bitcoin,qtumproject/qtum,jambolo/bitcoin,sebrandon1/bitcoin,lateminer/bitcoin,kallewoof/bitcoin,ahmedbodi/vertcoin,gjhiggins/vcoincore,practicalswift/bitcoin,lbryio/lbrycrd,bespike/litecoin,jnewbery/bitcoin,ElementsProject/elements,rawodb/bitcoin,peercoin/peercoin,MarcoFalke/bitcoin,andreaskern/bitcoin,FeatherCoin/Feathercoin,randy-waterhouse/bitcoin,ahmedbodi/vertcoin,peercoin/peercoin,BTCGPU/BTCGPU,lbryio/lbrycrd,domob1812/bitcoin,EthanHeilman/bitcoin,RHavar/bitcoin,untrustbank/litecoin,ericshawlinux/bitcoin,gjhiggins/vcoincore,rawodb/bitcoin,achow101/bitcoin,JeremyRubin/bitcoin,qtumproject/qtum,lbryio/lbrycrd,MeshCollider/bitcoin,guncoin/guncoin,ericshawlinux/bitcoin,namecoin/namecoin-core,ajtowns/bitcoin,digibyte/digibyte,fujicoin/fujicoin,h4x3rotab/BTCGPU,namecoin/namecore,mm-s/bitcoin,wellenreiter01/Feathercoin,bitcoinsSG/bitcoin,wellenreiter01/Feathercoin,mruddy/bitcoin,Kogser/bitcoin,JeremyRubin/bitcoin,practicalswift/bitcoin,achow101/bitcoin,Christewart/bitcoin,bitcoinknots/bitcoin,droark/bitcoin,practicalswift/bitcoin,apoelstra/bitcoin,GroestlCoin/GroestlCoin,anditto/bitcoin,litecoin-project/litecoin,tjps/bitcoin,yenliangl/bitcoin,myriadcoin/myriadcoin,mm-s/bitcoin,alecalve/bitcoin,untrustbank/litecoin,jmcorgan/bitcoin,pataquets/namecoin-core,mruddy/bitcoin,alecalve/bitcoin,bitcoin/bitcoin,RHavar/bitcoin,thrasher-/litecoin,bitcoinsSG/bitcoin,myriadcoin/myriadcoin,peercoin/peercoin,afk11/bitcoin,FeatherCoin/Feathercoin,prusnak/bitcoin,lbryio/lbrycrd,wellenreiter01/Feathercoin,rnicoll/dogecoin,OmniLayer/omnicore,digibyte/digibyte,rnicoll/dogecoin,JeremyRubin/bitcoin,ElementsProject/elements,domob1812/bitcoin,AkioNak/bitcoin,sipsorcery/bitcoin,alecalve/bitcoin,droark/bitcoin,jamesob/bitcoin,kallewoof/bitcoin,tjps/bitcoin,prusnak/bitcoin,practicalswift/bitcoin,jambolo/bitcoin,qtumproject/qtum,alecalve/bitcoin,fanquake/bitcoin,bitcoinsSG/bitcoin,sebrandon1/bitcoin,bitcoinsSG/bitcoin,lateminer/bitcoin,rnicoll/bitcoin,pataquets/namecoin-core,Bushstar/UFO-Project,apoelstra/bitcoin,namecoin/namecoin-core,n1bor/bitcoin,OmniLayer/omnicore,sstone/bitcoin,domob1812/namecore,GroestlCoin/bitcoin,litecoin-project/litecoin,GlobalBoost/GlobalBoost,fujicoin/fujicoin,bitcoin/bitcoin,rnicoll/bitcoin,myriadteam/myriadcoin,particl/particl-core,sebrandon1/bitcoin,JeremyRubin/bitcoin,thrasher-/litecoin,monacoinproject/monacoin,domob1812/namecore,Sjors/bitcoin,yenliangl/bitcoin,jmcorgan/bitcoin,anditto/bitcoin,bitcoinknots/bitcoin,dscotese/bitcoin,DigitalPandacoin/pandacoin,dscotese/bitcoin,bespike/litecoin,MeshCollider/bitcoin,sebrandon1/bitcoin,OmniLayer/omnicore,bespike/litecoin,Xekyo/bitcoin,mruddy/bitcoin,rnicoll/bitcoin,cdecker/bitcoin,GroestlCoin/bitcoin,fanquake/bitcoin,Kogser/bitcoin,GroestlCoin/GroestlCoin,BTCGPU/BTCGPU,DigitalPandacoin/pandacoin,namecoin/namecoin-core,namecoin/namecoin-core,bitcoinknots/bitcoin,pataquets/namecoin-core,digibyte/digibyte,domob1812/namecore,Sjors/bitcoin,fanquake/bitcoin,fujicoin/fujicoin,jambolo/bitcoin,droark/bitcoin,afk11/bitcoin,jamesob/bitcoin,Bushstar/UFO-Project,JeremyRubin/bitcoin,lbryio/lbrycrd,ericshawlinux/bitcoin,alecalve/bitcoin,rawodb/bitcoin,rnicoll/dogecoin,MeshCollider/bitcoin,kazcw/bitcoin,litecoin-project/litecoin,anditto/bitcoin,kallewoof/bitcoin,jnewbery/bitcoin,thrasher-/litecoin,n1bor/bitcoin,randy-waterhouse/bitcoin,DigitalPandacoin/pandacoin,practicalswift/bitcoin,h4x3rotab/BTCGPU,mitchellcash/bitcoin,Flowdalic/bitcoin,thrasher-/litecoin,ajtowns/bitcoin,prusnak/bitcoin,h4x3rotab/BTCGPU,domob1812/bitcoin,wellenreiter01/Feathercoin,litecoin-project/litecoin,myriadteam/myriadcoin,afk11/bitcoin,MarcoFalke/bitcoin,gjhiggins/vcoincore,rnicoll/dogecoin,ajtowns/bitcoin,MarcoFalke/bitcoin,rnicoll/bitcoin,achow101/bitcoin,r8921039/bitcoin,instagibbs/bitcoin,rnicoll/dogecoin,ElementsProject/elements,sipsorcery/bitcoin,RHavar/bitcoin,randy-waterhouse/bitcoin,EthanHeilman/bitcoin,domob1812/huntercore,mruddy/bitcoin,pstratem/bitcoin,jambolo/bitcoin,MeshCollider/bitcoin,digibyte/digibyte,ElementsProject/elements,Flowdalic/bitcoin,jmcorgan/bitcoin,Xekyo/bitcoin,namecoin/namecoin-core,nikkitan/bitcoin,DigitalPandacoin/pandacoin,CryptArc/bitcoin,achow101/bitcoin,myriadteam/myriadcoin,mitchellcash/bitcoin,litecoin-project/litecoin,jtimon/bitcoin,yenliangl/bitcoin,AkioNak/bitcoin,Kogser/bitcoin,jtimon/bitcoin,AkioNak/bitcoin,ahmedbodi/vertcoin,Kogser/bitcoin,jonasschnelli/bitcoin,OmniLayer/omnicore,guncoin/guncoin,Christewart/bitcoin,pstratem/bitcoin,lbryio/lbrycrd,achow101/bitcoin,jlopp/statoshi,apoelstra/bitcoin,jnewbery/bitcoin,DigitalPandacoin/pandacoin,GlobalBoost/GlobalBoost,domob1812/namecore,qtumproject/qtum,yenliangl/bitcoin,fujicoin/fujicoin,gjhiggins/vcoincore,OmniLayer/omnicore,joshrabinowitz/bitcoin,rnicoll/bitcoin,midnightmagic/bitcoin,Christewart/bitcoin,qtumproject/qtum,particl/particl-core,domob1812/bitcoin,Bushstar/UFO-Project,CryptArc/bitcoin,myriadcoin/myriadcoin,BTCGPU/BTCGPU,cdecker/bitcoin,lateminer/bitcoin,ahmedbodi/vertcoin,lbryio/lbrycrd,tjps/bitcoin,domob1812/namecore,BTCGPU/BTCGPU,namecoin/namecoin-core,tjps/bitcoin,GroestlCoin/GroestlCoin,AkioNak/bitcoin,cdecker/bitcoin,jamesob/bitcoin,nikkitan/bitcoin,n1bor/bitcoin,jlopp/statoshi,Christewart/bitcoin,myriadcoin/myriadcoin,jtimon/bitcoin,mitchellcash/bitcoin,jmcorgan/bitcoin,dscotese/bitcoin,andreaskern/bitcoin,GroestlCoin/GroestlCoin,particl/particl-core,jonasschnelli/bitcoin,bitcoinknots/bitcoin,ajtowns/bitcoin,sebrandon1/bitcoin,midnightmagic/bitcoin,tecnovert/particl-core,cdecker/bitcoin,bespike/litecoin,domob1812/huntercore,GlobalBoost/GlobalBoost,mm-s/bitcoin,pataquets/namecoin-core,pstratem/bitcoin,mm-s/bitcoin,tecnovert/particl-core,joshrabinowitz/bitcoin,jlopp/statoshi,untrustbank/litecoin,tecnovert/particl-core,h4x3rotab/BTCGPU,CryptArc/bitcoin,ericshawlinux/bitcoin,r8921039/bitcoin,fanquake/bitcoin,kallewoof/bitcoin,peercoin/peercoin,domob1812/huntercore,afk11/bitcoin,gjhiggins/vcoincore,bitcoin/bitcoin,apoelstra/bitcoin,Sjors/bitcoin,vmp32k/litecoin,joshrabinowitz/bitcoin,apoelstra/bitcoin,vertcoin/vertcoin,instagibbs/bitcoin,joshrabinowitz/bitcoin,GroestlCoin/bitcoin,tecnovert/particl-core,monacoinproject/monacoin,andreaskern/bitcoin,MeshCollider/bitcoin,pataquets/namecoin-core,jamesob/bitcoin,vmp32k/litecoin,kallewoof/bitcoin,MarcoFalke/bitcoin,jmcorgan/bitcoin,BTCGPU/BTCGPU,EthanHeilman/bitcoin,particl/particl-core,lateminer/bitcoin,pstratem/bitcoin,jnewbery/bitcoin,kazcw/bitcoin,yenliangl/bitcoin,kazcw/bitcoin,sipsorcery/bitcoin