command: better description of keys command and ordered arguments in help message
command: better description of keys command and ordered arguments in help message

patrickviet/serf,dalehamel/serf,mbrukman/serf,yonglehou/serf,samaitra/serf,minhkiller/serf,hashicorp/serf,hashicorp/serf,mapuri/serf,samaitra/serf,FollowMyDev/serf,yonglehou/serf,samaitra/serf,patrickviet/serf,mbrukman/serf,patrickviet/serf,minhkiller/serf,FollowMyDev/serf,mapuri/serf,mbrukman/serf,minhkiller/serf,gnawhleinad/serf,dalehamel/serf,mapuri/serf,curtiszimmerman/serf,mapuri/serf,minhkiller/serf,hashicorp/serf,dalehamel/serf,gnawhleinad/serf,patrickviet/serf,FollowMyDev/serf,hashicorp/serf,curtiszimmerman/serf,dalehamel/serf,minhkiller/serf,yonglehou/serf,pmenglund/serf,mbrukman/serf,yonglehou/serf,FollowMyDev/serf,curtiszimmerman/serf,gnawhleinad/serf,jmptrader/serf,mbrukman/serf,gnawhleinad/serf,mapuri/serf,jmptrader/serf,mbrukman/serf,pmenglund/serf,pmenglund/serf,samaitra/serf,hashicorp/serf,pmenglund/serf,curtiszimmerman/serf,dalehamel/serf,pmenglund/serf,patrickviet/serf,gnawhleinad/serf,curtiszimmerman/serf,patrickviet/serf,jmptrader/serf,jmptrader/serf,dalehamel/serf,jmptrader/serf,yonglehou/serf,yonglehou/serf,gnawhleinad/serf,jmptrader/serf,samaitra/serf,samaitra/serf,mapuri/serf,minhkiller/serf,FollowMyDev/serf,curtiszimmerman/serf,FollowMyDev/serf,pmenglund/serf