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- Move global network epoch definition to epoch.h, as more different

Description

  • Move global network epoch definition to epoch.h, as more different subsystems tend to need to know about it, and including if_var.h is huge header pollution for them. Polluting possible non-network users with single symbol seems much lesser evil.
  • Remove non-preemptible network epoch. Not used yet, and unlikely to get used in close future.

Details

Provenance
glebiusAuthored on
Parents
rS356747: The non-preemptible network epoch identified by net_epoch isn't used.
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