5.13. PopDist and PopRun

3.2.0

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For PopRun on Pod systems, added functionality that automatically detects the RNIC interfaces to use for host-to-host communication. Refer to the section in the user guide on Network interfaces for more information about how to override the settings.
Removed the --vipu-cluster command line option. Use the --vipu-allocation option instead. See the Configuration section in the PopDist and PopRun User Guide for more information.
Added the --hostfile and --machinefile command line options. See the Configuration section in the PopDist and PopRun User Guide for more information.

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popdist::isBackendInitialized now returns False if that backend has not yet been registered. This is a more intuitive result for the user than throwing an exception (which was the previous behaviour). If you are calling this function already, this new behaviour is what will happen. No further change required.
Improvements to the documentation:

documented that PopRun ignores IPUOF_VIPU_XXX environment variables.

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