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misc/119874: "/etc/rc.d/pf reload" fails if there are macros defined in pf_flags rc variable

>Number:         119874
>Category:       misc
>Synopsis:       "/etc/rc.d/pf reload" fails if there are macros defined in pf_flags rc variable
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-bugs
>State:          open
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Mon Jan 21 21:20:01 UTC 2008
>Originator:     Niki Denev
>Release:        FreeBSD 7.0-PRERELEASE
FreeBSD rtr1 7.0-PRERELEASE FreeBSD 7.0-PRERELEASE #1: Mon Jan 21 17:24:53 UTC 2008     root_(_at_)_rtr3:/usr/obj/usr/src/sys/RTR  amd64

I'm using the pf_flags rc var to set macros for pf.conf 
files i use in redundant router configuration.
This way i can have exactly the same pf.conf on all 
of the routers, and still set host specific
options as "hostid" used by pfsync via rc.conf
The problem is that when i use "/etc/rc.d/pf reload" to reload the rules,
the rc.d/pf script first executes pfctl with -n option to check the
pf.conf syntax, but fails to include
the $pf_flags var, and fails because of undefined macros.
use macros in pf.conf defined in rc.conf as pf_flags="-D macro=value"
and then do
# /etc/rc.d/pf reload

and it will fail because when the rules are checked on reloading the $pf_flags variable is not included in the command.
Small patch to /etc/rc.d/pf which adds $pf_flags variable when executing pfctl with "-n" flag to check ruleset syntax.

Patch attached with submission follows:

--- /etc/rc.d/pf.orig	2008-01-21 11:18:27.000000000 +0200
+++ /etc/rc.d/pf	2008-01-21 11:29:56.000000000 +0200
@@ -50,7 +50,7 @@
 	echo "Reloading pf rules."
-	$pf_program -n -f "$pf_rules" || return 1
+	$pf_program -n -f "$pf_rules" $pf_flags || return 1
 	# Flush everything but existing state entries that way when
 	# rules are read in, it doesn't break established connections.
 	$pf_program -Fnat -Fqueue -Frules -FSources -Finfo -FTables -Fosfp > /dev/null 2>&1

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