git: d600d25179f2 - stable/13 - ipfilter: Fixup comment

The branch stable/13 has been updated by cy:

URL: https://cgit.FreeBSD.org/src/commit/?id=d600d25179f23479c66ddfc3962b65c92f07dc2a

commit d600d25179f23479c66ddfc3962b65c92f07dc2a
Author:     Cy Schubert <cy@FreeBSD.org>
AuthorDate: 2022-01-12 21:03:46 +0000
Commit:     Cy Schubert <cy@FreeBSD.org>
CommitDate: 2022-01-19 14:19:24 +0000

    ipfilter: Fixup comment
    
    Fix comment documenting checksum block in ip_nat.c. Fastforward doesn't
    perform checksum.
    
    (cherry picked from commit 896a0153190937e071a31c682c6cf55e4c599886)
---
 sys/contrib/ipfilter/netinet/ip_nat.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/sys/contrib/ipfilter/netinet/ip_nat.c b/sys/contrib/ipfilter/netinet/ip_nat.c
index cab4700be4a7..09430c1fdfe5 100644
--- a/sys/contrib/ipfilter/netinet/ip_nat.c
+++ b/sys/contrib/ipfilter/netinet/ip_nat.c
@@ -5128,10 +5128,8 @@ ipf_nat_out(fin, nat, natadd, nflags)
     defined(BRIDGE_IPF) || defined(__FreeBSD__)
 	else {
 		/*
-		 * Strictly speaking, this isn't necessary on BSD
-		 * kernels because they do checksum calculation after
-		 * this code has run BUT if ipfilter is being used
-		 * to do NAT as a bridge, that code doesn't exist.
+		 * We always do this on FreeBSD because this code doesn't
+		 * exist in fastforward.
 		 */
 		switch (nat->nat_dir)
 		{