Remove the AFM (Anti-Footshooting Measure) added when we split the 5.x signal code from the 4.x signal code. The split happened in Oct 2002 and we have had 2 releases since then. A kernel older than 5.0-R cannot reasonably be called a -current kernel anymore.
Remove the AFM (Anti-Footshooting Measure) added when we split the
5.x signal code from the 4.x signal code. The split happened in
Oct 2002 and we have had 2 releases since then. A kernel older than
5.0-R cannot reasonably be called a -current kernel anymore.

This does not break upgrading from an 10 month older kernel. It just
makes it more exiting.

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