Support multiple cyclic groups for smaller subnets
Support multiple cyclic groups for smaller subnets

We will choose the first one in the list that is large enough to support
the number of hosts chosen. This speeds up scanning small networks considerably:
e.g. /16s can be scanned in <200ms (+ cooldown)

scarito/zmap,zmap/zmap,willscott/zmap,djeraseit/zmap,KeelanArrendale/zmap,scarito/zmap,potatozhao/zmap,3L3N4/zmap,willscott/zmap,coydog/zmap-freebsd,shakenetwork/zmap,KeelanArrendale/zmap,shakenetwork/zmap,coydog/zmap-freebsd,coolacid/zmap,unixfreaxjp/zmap,coydog/zmap-freebsd,unixfreaxjp/zmap,eacha/zmap,BobuSumisu/zmap,potatozhao/zmap,coolacid/zmap,zhuyue1314/zmap,djeraseit/zmap,eacha/zmap,BobuSumisu/zmap,unixfreaxjp/zmap,djeraseit/zmap,coolacid/zmap,unixfreaxjp/zmap,zmap/zmap,BobuSumisu/zmap,BobuSumisu/zmap,coolacid/zmap,zhuyue1314/zmap,zhuyue1314/zmap,scarito/zmap,shakenetwork/zmap,djeraseit/zmap,zhuyue1314/zmap,3L3N4/zmap,3L3N4/zmap,zmap/zmap,eacha/zmap,scarito/zmap-android,cicku/zmap,willscott/zmap,scarito/zmap,willscott/zmap,shakenetwork/zmap,3L3N4/zmap,potatozhao/zmap,coolacid/zmap,eacha/zmap,tdi/zmap,scarito/zmap,zhuyue1314/zmap,cicku/zmap,cicku/zmap,scarito/zmap-android,djeraseit/zmap,eacha/zmap,cicku/zmap,tdi/zmap,potatozhao/zmap,shakenetwork/zmap,unixfreaxjp/zmap,KeelanArrendale/zmap,tdi/zmap,tdi/zmap,cicku/zmap,KeelanArrendale/zmap,BobuSumisu/zmap,willscott/zmap,potatozhao/zmap,3L3N4/zmap,scarito/zmap-android,tdi/zmap,KeelanArrendale/zmap,scarito/zmap-android