command/query: Refactor output handling into interface
command/query: Refactor output handling into interface

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