command/agent: always ignore old for agent join
command/agent: always ignore old for agent join

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