sysutils/builldah: fix a nil pointer dereference

Attempting to use 'buildah run --network=host' caused a nil pointer
dereference while setting up the container's resolv.conf file.

PR:	280777

sysutils/buildah/Makefile

@@ -1,7 +1,7 @@
 PORTNAME=	buildah
 DISTVERSIONPREFIX=	v
 DISTVERSION=	1.36.0
-PORTREVISION=	3
+PORTREVISION=	4
 CATEGORIES=	sysutils
 
 MAINTAINER=	dfr@FreeBSD.org

sysutils/buildah/files/patch-run__freebsd.go

@@ -0,0 +1,11 @@
+--- run_freebsd.go.orig	2024-08-18 10:59:26 UTC
++++ run_freebsd.go
+@@ -244,7 +244,7 @@ func (b *Builder) Run(command []string, options RunOpt
+ 		// Only add entries here if we do not have to do setup network,
+ 		// if we do we have to do it much later after the network setup.
+ 		if !configureNetwork {
+-			err = b.addResolvConfEntries(resolvFile, nil, nil, false, true)
++			err = b.addResolvConfEntries(resolvFile, nil, spec, false, true)
+ 			if err != nil {
+ 				return err
+ 			}