Make client title "<invalid>" if the client host/port combo is invalid.
Make client title "<invalid>" if the client host/port combo is invalid.

jkonopka/F53OSC,Figure53/F53OSC,DouglasHeriot/F53OSC,seandougall/F53OSC,Figure53/F53OSC,richardwilliamson/F53OSC-RW,edmstudio/F53OSC,Figure53/F53OSC