doc: Update OpenBSD build instructions for 6.2
doc: Update OpenBSD build instructions for 6.2

There is no more need to install a compiler. This simplifies
instructions a lot.

namecoin/namecoin-core,brandonrobertz/namecoin-core,qtumproject/qtum,joshrabinowitz/bitcoin,lateminer/bitcoin,tecnovert/particl-core,afk11/bitcoin,dscotese/bitcoin,starwels/starwels,untrustbank/litecoin,particl/particl-core,r8921039/bitcoin,ahmedbodi/vertcoin,alecalve/bitcoin,bitcoinknots/bitcoin,Xekyo/bitcoin,rawodb/bitcoin,particl/particl-core,TheBlueMatt/bitcoin,mitchellcash/bitcoin,lbryio/lbrycrd,prusnak/bitcoin,globaltoken/globaltoken,GroestlCoin/GroestlCoin,anditto/bitcoin,apoelstra/bitcoin,jamesob/bitcoin,GroestlCoin/GroestlCoin,jmcorgan/bitcoin,untrustbank/litecoin,wellenreiter01/Feathercoin,FeatherCoin/Feathercoin,maaku/bitcoin,rawodb/bitcoin,vmp32k/litecoin,deeponion/deeponion,gjhiggins/vcoincore,sstone/bitcoin,RHavar/bitcoin,MarcoFalke/bitcoin,Bushstar/UFO-Project,Kogser/bitcoin,myriadcoin/myriadcoin,digibyte/digibyte,ppcoin/ppcoin,pataquets/namecoin-core,n1bor/bitcoin,fanquake/bitcoin,jlopp/statoshi,viacoin/viacoin,brandonrobertz/namecoin-core,TheBlueMatt/bitcoin,qtumproject/qtum,pstratem/bitcoin,bitcoinsSG/bitcoin,vmp32k/litecoin,sipsorcery/bitcoin,rnicoll/bitcoin,deeponion/deeponion,vmp32k/litecoin,mb300sd/bitcoin,sipsorcery/bitcoin,Flowdalic/bitcoin,digibyte/digibyte,OmniLayer/omnicore,n1bor/bitcoin,EthanHeilman/bitcoin,wellenreiter01/Feathercoin,1185/starwels,prusnak/bitcoin,globaltoken/globaltoken,myriadcoin/myriadcoin,kallewoof/bitcoin,tjps/bitcoin,practicalswift/bitcoin,paveljanik/bitcoin,MeshCollider/bitcoin,bitcoinsSG/bitcoin,achow101/bitcoin,ericshawlinux/bitcoin,cdecker/bitcoin,h4x3rotab/BTCGPU,mm-s/bitcoin,jmcorgan/bitcoin,Christewart/bitcoin,GroestlCoin/bitcoin,bitcoin/bitcoin,myriadteam/myriadcoin,GroestlCoin/bitcoin,Kogser/bitcoin,bitcoinknots/bitcoin,viacoin/viacoin,pstratem/bitcoin,viacoin/viacoin,domob1812/bitcoin,kallewoof/bitcoin,stamhe/bitcoin,MarcoFalke/bitcoin,globaltoken/globaltoken,mruddy/bitcoin,sstone/bitcoin,FeatherCoin/Feathercoin,Kogser/bitcoin,bitcoin/bitcoin,rnicoll/bitcoin,brandonrobertz/namecoin-core,ericshawlinux/bitcoin,practicalswift/bitcoin,randy-waterhouse/bitcoin,andreaskern/bitcoin,sstone/bitcoin,fanquake/bitcoin,lbryio/lbrycrd,instagibbs/bitcoin,instagibbs/bitcoin,MarcoFalke/bitcoin,bitcoinsSG/bitcoin,droark/bitcoin,donaloconnor/bitcoin,fujicoin/fujicoin,sebrandon1/bitcoin,jtimon/bitcoin,sebrandon1/bitcoin,peercoin/peercoin,viacoin/viacoin,domob1812/namecore,kazcw/bitcoin,thrasher-/litecoin,myriadcoin/myriadcoin,GlobalBoost/GlobalBoost,TheBlueMatt/bitcoin,droark/bitcoin,Kogser/bitcoin,fujicoin/fujicoin,AkioNak/bitcoin,BTCGPU/BTCGPU,joshrabinowitz/bitcoin,sipsorcery/bitcoin,Bushstar/UFO-Project,mm-s/bitcoin,qtumproject/qtum,midnightmagic/bitcoin,dscotese/bitcoin,litecoin-project/litecoin,laudaa/bitcoin,Kogser/bitcoin,1185/starwels,lateminer/bitcoin,MeshCollider/bitcoin,Kogser/bitcoin,bitcoin/bitcoin,starwels/starwels,practicalswift/bitcoin,1185/starwels,Flowdalic/bitcoin,tjps/bitcoin,achow101/bitcoin,FeatherCoin/Feathercoin,digibyte/digibyte,midnightmagic/bitcoin,randy-waterhouse/bitcoin,lateminer/bitcoin,paveljanik/bitcoin,ahmedbodi/vertcoin,bitcoinsSG/bitcoin,nikkitan/bitcoin,BTCGPU/BTCGPU,jlopp/statoshi,rawodb/bitcoin,maaku/bitcoin,jtimon/bitcoin,jtimon/bitcoin,rnicoll/bitcoin,jtimon/bitcoin,gjhiggins/vcoincore,MeshCollider/bitcoin,tecnovert/particl-core,Bushstar/UFO-Project,bespike/litecoin,ajtowns/bitcoin,h4x3rotab/BTCGPU,globaltoken/globaltoken,MeshCollider/bitcoin,TheBlueMatt/bitcoin,droark/bitcoin,GroestlCoin/bitcoin,peercoin/peercoin,bespike/litecoin,monacoinproject/monacoin,pstratem/bitcoin,namecoin/namecore,monacoinproject/monacoin,randy-waterhouse/bitcoin,namecoin/namecore,RHavar/bitcoin,alecalve/bitcoin,gjhiggins/vcoincore,alecalve/bitcoin,ElementsProject/elements,bespike/litecoin,laudaa/bitcoin,h4x3rotab/BTCGPU,jambolo/bitcoin,prusnak/bitcoin,yenliangl/bitcoin,bitcoin/bitcoin,apoelstra/bitcoin,ppcoin/ppcoin,namecoin/namecore,ajtowns/bitcoin,ahmedbodi/vertcoin,practicalswift/bitcoin,bitcoinknots/bitcoin,guncoin/guncoin,Christewart/bitcoin,cdecker/bitcoin,MazaCoin/maza,ajtowns/bitcoin,Christewart/bitcoin,Flowdalic/bitcoin,mitchellcash/bitcoin,lateminer/bitcoin,h4x3rotab/BTCGPU,MazaCoin/maza,joshrabinowitz/bitcoin,sstone/bitcoin,Flowdalic/bitcoin,ElementsProject/elements,laudaa/bitcoin,mruddy/bitcoin,Flowdalic/bitcoin,brandonrobertz/namecoin-core,myriadteam/myriadcoin,domob1812/huntercore,afk11/bitcoin,MarcoFalke/bitcoin,domob1812/bitcoin,OmniLayer/omnicore,Kogser/bitcoin,JeremyRubin/bitcoin,jamesob/bitcoin,lbryio/lbrycrd,ahmedbodi/vertcoin,maaku/bitcoin,dscotese/bitcoin,achow101/bitcoin,dscotese/bitcoin,midnightmagic/bitcoin,starwels/starwels,ericshawlinux/bitcoin,guncoin/guncoin,CryptArc/bitcoin,namecoin/namecoin-core,n1bor/bitcoin,thrasher-/litecoin,mruddy/bitcoin,fujicoin/fujicoin,ericshawlinux/bitcoin,AkioNak/bitcoin,Bushstar/UFO-Project,jamesob/bitcoin,qtumproject/qtum,jambolo/bitcoin,mm-s/bitcoin,stamhe/bitcoin,thrasher-/litecoin,cdecker/bitcoin,kazcw/bitcoin,AkioNak/bitcoin,Xekyo/bitcoin,bitcoinsSG/bitcoin,MarcoFalke/bitcoin,myriadteam/myriadcoin,globaltoken/globaltoken,CryptArc/bitcoin,namecoin/namecoin-core,MeshCollider/bitcoin,yenliangl/bitcoin,RHavar/bitcoin,domob1812/huntercore,qtumproject/qtum,JeremyRubin/bitcoin,jamesob/bitcoin,yenliangl/bitcoin,deeponion/deeponion,kazcw/bitcoin,r8921039/bitcoin,domob1812/bitcoin,CryptArc/bitcoin,starwels/starwels,1185/starwels,EthanHeilman/bitcoin,Sjors/bitcoin,jmcorgan/bitcoin,nikkitan/bitcoin,jamesob/bitcoin,stamhe/bitcoin,jmcorgan/bitcoin,donaloconnor/bitcoin,mitchellcash/bitcoin,ajtowns/bitcoin,brandonrobertz/namecoin-core,ryanofsky/bitcoin,wellenreiter01/Feathercoin,brandonrobertz/namecoin-core,monacoinproject/monacoin,jonasschnelli/bitcoin,MazaCoin/maza,AkioNak/bitcoin,r8921039/bitcoin,joshrabinowitz/bitcoin,OmniLayer/omnicore,domob1812/namecore,BTCGPU/BTCGPU,JeremyRubin/bitcoin,qtumproject/qtum,ElementsProject/elements,EthanHeilman/bitcoin,paveljanik/bitcoin,CryptArc/bitcoin,litecoin-project/litecoin,prusnak/bitcoin,stamhe/bitcoin,randy-waterhouse/bitcoin,DigitalPandacoin/pandacoin,deeponion/deeponion,GlobalBoost/GlobalBoost,midnightmagic/bitcoin,myriadteam/myriadcoin,droark/bitcoin,anditto/bitcoin,cdecker/bitcoin,MazaCoin/maza,donaloconnor/bitcoin,ElementsProject/elements,digibyte/digibyte,ElementsProject/elements,ryanofsky/bitcoin,namecoin/namecore,fanquake/bitcoin,rnicoll/dogecoin,RHavar/bitcoin,mb300sd/bitcoin,afk11/bitcoin,vmp32k/litecoin,namecoin/namecoin-core,jlopp/statoshi,pataquets/namecoin-core,Bushstar/UFO-Project,kazcw/bitcoin,vertcoin/vertcoin,kazcw/bitcoin,gjhiggins/vcoincore,domob1812/namecore,pstratem/bitcoin,stamhe/bitcoin,viacoin/viacoin,GroestlCoin/GroestlCoin,JeremyRubin/bitcoin,tjps/bitcoin,Flowdalic/bitcoin,guncoin/guncoin,AkioNak/bitcoin,randy-waterhouse/bitcoin,mitchellcash/bitcoin,rawodb/bitcoin,laudaa/bitcoin,kallewoof/bitcoin,stamhe/bitcoin,myriadteam/myriadcoin,Sjors/bitcoin,vmp32k/litecoin,particl/particl-core,ajtowns/bitcoin,globaltoken/globaltoken,paveljanik/bitcoin,vertcoin/vertcoin,GroestlCoin/GroestlCoin,jnewbery/bitcoin,ppcoin/ppcoin,jmcorgan/bitcoin,sebrandon1/bitcoin,sipsorcery/bitcoin,lbryio/lbrycrd,jnewbery/bitcoin,GroestlCoin/bitcoin,monacoinproject/monacoin,sstone/bitcoin,r8921039/bitcoin,litecoin-project/litecoin,anditto/bitcoin,domob1812/namecore,CryptArc/bitcoin,jlopp/statoshi,guncoin/guncoin,droark/bitcoin,ElementsProject/elements,kazcw/bitcoin,peercoin/peercoin,Christewart/bitcoin,ryanofsky/bitcoin,jtimon/bitcoin,tecnovert/particl-core,ericshawlinux/bitcoin,nikkitan/bitcoin,GroestlCoin/GroestlCoin,MeshCollider/bitcoin,ryanofsky/bitcoin,qtumproject/qtum,afk11/bitcoin,TheBlueMatt/bitcoin,jambolo/bitcoin,litecoin-project/litecoin,untrustbank/litecoin,apoelstra/bitcoin,domob1812/huntercore,Christewart/bitcoin,fujicoin/fujicoin,monacoinproject/monacoin,ryanofsky/bitcoin,untrustbank/litecoin,r8921039/bitcoin,vmp32k/litecoin,sebrandon1/bitcoin,thrasher-/litecoin,domob1812/bitcoin,achow101/bitcoin,deeponion/deeponion,apoelstra/bitcoin,apoelstra/bitcoin,tjps/bitcoin,gjhiggins/vcoincore,gjhiggins/vcoincore,guncoin/guncoin,anditto/bitcoin,instagibbs/bitcoin,bitcoin/bitcoin,mm-s/bitcoin,fanquake/bitcoin,GlobalBoost/GlobalBoost,myriadteam/myriadcoin,ericshawlinux/bitcoin,jambolo/bitcoin,andreaskern/bitcoin,1185/starwels,digibyte/digibyte,FeatherCoin/Feathercoin,ryanofsky/bitcoin,rnicoll/dogecoin,alecalve/bitcoin,untrustbank/litecoin,maaku/bitcoin,randy-waterhouse/bitcoin,laudaa/bitcoin,dscotese/bitcoin,jnewbery/bitcoin,mruddy/bitcoin,alecalve/bitcoin,JeremyRubin/bitcoin,rawodb/bitcoin,mitchellcash/bitcoin,Christewart/bitcoin,mm-s/bitcoin,n1bor/bitcoin,nikkitan/bitcoin,BTCGPU/BTCGPU,MarcoFalke/bitcoin,JeremyRubin/bitcoin,Kogser/bitcoin,domob1812/bitcoin,pataquets/namecoin-core,GroestlCoin/bitcoin,maaku/bitcoin,domob1812/huntercore,donaloconnor/bitcoin,afk11/bitcoin,guncoin/guncoin,DigitalPandacoin/pandacoin,OmniLayer/omnicore,fanquake/bitcoin,Xekyo/bitcoin,donaloconnor/bitcoin,dscotese/bitcoin,bitcoin/bitcoin,paveljanik/bitcoin,instagibbs/bitcoin,paveljanik/bitcoin,bitcoinsSG/bitcoin,cdecker/bitcoin,litecoin-project/litecoin,EthanHeilman/bitcoin,jonasschnelli/bitcoin,ajtowns/bitcoin,domob1812/namecore,jlopp/statoshi,MazaCoin/maza,kallewoof/bitcoin,particl/particl-core,mb300sd/bitcoin,afk11/bitcoin,bitcoinknots/bitcoin,lbryio/lbrycrd,GlobalBoost/GlobalBoost,DigitalPandacoin/pandacoin,laudaa/bitcoin,rnicoll/dogecoin,mruddy/bitcoin,wellenreiter01/Feathercoin,pstratem/bitcoin,joshrabinowitz/bitcoin,lateminer/bitcoin,ahmedbodi/vertcoin,ahmedbodi/vertcoin,1185/starwels,namecoin/namecoin-core,vertcoin/vertcoin,CryptArc/bitcoin,mb300sd/bitcoin,lateminer/bitcoin,TheBlueMatt/bitcoin,bitcoinknots/bitcoin,monacoinproject/monacoin,BTCGPU/BTCGPU,starwels/starwels,Sjors/bitcoin,bespike/litecoin,EthanHeilman/bitcoin,rnicoll/dogecoin,Sjors/bitcoin,thrasher-/litecoin,jamesob/bitcoin,domob1812/huntercore,andreaskern/bitcoin,kallewoof/bitcoin,n1bor/bitcoin,wellenreiter01/Feathercoin,achow101/bitcoin,Xekyo/bitcoin,mm-s/bitcoin,jambolo/bitcoin,jnewbery/bitcoin,midnightmagic/bitcoin,bespike/litecoin,GlobalBoost/GlobalBoost,untrustbank/litecoin,GlobalBoost/GlobalBoost,RHavar/bitcoin,fujicoin/fujicoin,midnightmagic/bitcoin,mitchellcash/bitcoin,yenliangl/bitcoin,fujicoin/fujicoin,RHavar/bitcoin,peercoin/peercoin,sipsorcery/bitcoin,fanquake/bitcoin,FeatherCoin/Feathercoin,lbryio/lbrycrd,DigitalPandacoin/pandacoin,h4x3rotab/BTCGPU,anditto/bitcoin,GroestlCoin/GroestlCoin,jlopp/statoshi,practicalswift/bitcoin,thrasher-/litecoin,Xekyo/bitcoin,domob1812/huntercore,bespike/litecoin,Bushstar/UFO-Project,jnewbery/bitcoin,jonasschnelli/bitcoin,achow101/bitcoin,jonasschnelli/bitcoin,Kogser/bitcoin,joshrabinowitz/bitcoin,mb300sd/bitcoin,namecoin/namecore,practicalswift/bitcoin,droark/bitcoin,vertcoin/vertcoin,tecnovert/particl-core,domob1812/bitcoin,BTCGPU/BTCGPU,myriadcoin/myriadcoin,andreaskern/bitcoin,rnicoll/dogecoin,pstratem/bitcoin,instagibbs/bitcoin,OmniLayer/omnicore,vertcoin/vertcoin,Sjors/bitcoin,namecoin/namecoin-core,anditto/bitcoin,jmcorgan/bitcoin,particl/particl-core,n1bor/bitcoin,viacoin/viacoin,lbryio/lbrycrd,yenliangl/bitcoin,EthanHeilman/bitcoin,rawodb/bitcoin,rnicoll/bitcoin,myriadcoin/myriadcoin,kallewoof/bitcoin,litecoin-project/litecoin,h4x3rotab/BTCGPU,myriadcoin/myriadcoin,nikkitan/bitcoin,yenliangl/bitcoin,pataquets/namecoin-core,pataquets/namecoin-core,sebrandon1/bitcoin,Kogser/bitcoin,sebrandon1/bitcoin,MazaCoin/maza,Kogser/bitcoin,apoelstra/bitcoin,prusnak/bitcoin,FeatherCoin/Feathercoin,peercoin/peercoin,tecnovert/particl-core,ppcoin/ppcoin,domob1812/namecore,OmniLayer/omnicore,jambolo/bitcoin,peercoin/peercoin,nikkitan/bitcoin,andreaskern/bitcoin,donaloconnor/bitcoin,mb300sd/bitcoin,sipsorcery/bitcoin,GlobalBoost/GlobalBoost,Kogser/bitcoin,maaku/bitcoin,pataquets/namecoin-core,deeponion/deeponion,sstone/bitcoin,GroestlCoin/bitcoin,r8921039/bitcoin,tjps/bitcoin,vertcoin/vertcoin,rnicoll/bitcoin,particl/particl-core,cdecker/bitcoin,tecnovert/particl-core,Xekyo/bitcoin,prusnak/bitcoin,mruddy/bitcoin,alecalve/bitcoin,jonasschnelli/bitcoin,digibyte/digibyte,starwels/starwels,rnicoll/bitcoin,namecoin/namecore,instagibbs/bitcoin,DigitalPandacoin/pandacoin,AkioNak/bitcoin,DigitalPandacoin/pandacoin,tjps/bitcoin,jtimon/bitcoin,andreaskern/bitcoin,wellenreiter01/Feathercoin