io.servers: using ?adjoin and ?delete in add/remove-running-server.
io.servers: using ?adjoin and ?delete in add/remove-running-server.

Also fixed a small bug in add-running-server where the error was
mistakenly constructed with running-servers instead of threaded-server.

tgunr/factor,bpollack/factor,mrjbq7/factor,bpollack/factor,mrjbq7/factor,tgunr/factor,bpollack/factor,factor/factor,bpollack/factor,tgunr/factor,mrjbq7/factor,AlexIljin/factor,tgunr/factor,AlexIljin/factor,bpollack/factor,mrjbq7/factor,AlexIljin/factor,tgunr/factor,factor/factor,tgunr/factor,mrjbq7/factor,AlexIljin/factor,AlexIljin/factor,bpollack/factor,AlexIljin/factor,factor/factor,factor/factor,factor/factor,factor/factor,bpollack/factor,AlexIljin/factor,mrjbq7/factor