[Bug 238796] ipfilter: failure to detect the same rules when arguments ordered differently

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=238796

--- Comment #33 from Cy Schubert <cy at FreeBSD.org> ---
Getting back to this PR, I discovered other problems related to this, i.e. only
space for 4 fr_ifnames. Put a fifth one in and the resulting structure becomes
a mess without an error message. The whole concept of only four fr_ifnames will
need to be reconstructed and why an arbitrary limit of only four? Add to this,
I don't know if a rule containing 2-4 interface names even works -- if it was a
half-implemented idea that was never implemented properly in the first place.

I can see how multiple interfaces in a rule could be handy though.

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