When running in remote server mode (-s), the value of the -s option
specifies which port remote clients must connect to for the job
transmission protocol. The servers for individual suite runs, however,
would be placed at dynamically assigned ports, with port numbers
transmitted to clients through job parameters.
This does not work well when servers sit behind firewalls with restricted
UDP port ranges. This patch introduces the -p option, allowing ports for
server runs to remain fixed at the given port (which, of course, must
not conflict with the port number supplied with -s).
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