[Bug 294859] pfctl -vnf and pfctl -vf  output differs for identical input

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=294859

            Bug ID: 294859
           Summary: pfctl -vnf and pfctl -vf output differs for identical
                    input
           Product: Base System
           Version: 15.0-STABLE
          Hardware: Any
                OS: Any
            Status: New
          Severity: Affects Many People
          Priority: ---
         Component: kern
          Assignee: bugs@FreeBSD.org
          Reporter: andy@codeedog.com

OS: 15.0-RELEASE-p6 FreeBSD 15.0-RELEASE-p6 GENERIC amd64

Expected behavior:

When passing flags -nv and -v to pfctl, both outputs should match.

Observed behavior:

The pfctl -nv output does not match -v output. Note: The pfctl -nv output omits
the "-- rule was already present" that pfctl -v output includes.

# Example: pf.conf
block in tagged FOO
pass in tag FOO
block in tagged FOO

> pfctl -vnf pf.conf
block drop in all tagged FOO
pass in all flags S/SA keep state tag FOO
block drop in all tagged FOO

> pfctl -vf pf.conf
No ALTQ support in kernel
ALTQ related functions disabled
block drop in all tagged FOO
pass in all flags S/SA keep state tag FOO
block drop in all tagged FOO -- rule was already present

> pfctl -sr
block drop in all tagged FOO
pass in all flags S/SA keep state tag FOO

Other notable tests that fail:

# Example 1:
block in
pass in
block in   # -- rule was already present

# Example 2:
pass in
block in
pass in    # -- rule was already present

This bug compounds Bug 294858 because a dry run of a file with the optimizer
turned off appears to work, but in reality, the optimizer cannot (currently) be
turned off.

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