Update options.html.markdown
Update options.html.markdown

Reword explanation for `-discover`.
dalehamel/serf,curtiszimmerman/serf,dalehamel/serf,gnawhleinad/serf,FollowMyDev/serf,curtiszimmerman/serf,curtiszimmerman/serf,gnawhleinad/serf,gnawhleinad/serf,patrickviet/serf,pmenglund/serf,samaitra/serf,minhkiller/serf,FollowMyDev/serf,FollowMyDev/serf,mapuri/serf,dalehamel/serf,mapuri/serf,hashicorp/serf,pmenglund/serf,hashicorp/serf,mapuri/serf,pmenglund/serf,mapuri/serf,FollowMyDev/serf,gnawhleinad/serf,minhkiller/serf,samaitra/serf,FollowMyDev/serf,dalehamel/serf,dalehamel/serf,patrickviet/serf,hashicorp/serf,curtiszimmerman/serf,minhkiller/serf,gnawhleinad/serf,mapuri/serf,pmenglund/serf,samaitra/serf,samaitra/serf,patrickviet/serf,hashicorp/serf,minhkiller/serf,curtiszimmerman/serf,samaitra/serf,pmenglund/serf,dalehamel/serf,patrickviet/serf,minhkiller/serf,pmenglund/serf,patrickviet/serf,samaitra/serf,gnawhleinad/serf,curtiszimmerman/serf,FollowMyDev/serf,hashicorp/serf,patrickviet/serf,mapuri/serf,minhkiller/serf