git: 896a01531909 - main - ipfilter: Fixup comment

The branch main has been updated by cy:

URL: https://cgit.FreeBSD.org/src/commit/?id=896a0153190937e071a31c682c6cf55e4c599886

commit 896a0153190937e071a31c682c6cf55e4c599886
Author:     Cy Schubert <cy@FreeBSD.org>
AuthorDate: 2022-01-12 21:03:46 +0000
Commit:     Cy Schubert <cy@FreeBSD.org>
CommitDate: 2022-01-12 21:03:46 +0000

    ipfilter: Fixup comment
    
    Fix comment documenting checksum block in ip_nat.c. Fastforward doesn't
    perform checksum.
    
    MFC after:      1 week
---
 sys/netpfil/ipfilter/netinet/ip_nat.c | 6 ++----
 1 file changed, 2 insertions(+), 4 deletions(-)

diff --git a/sys/netpfil/ipfilter/netinet/ip_nat.c b/sys/netpfil/ipfilter/netinet/ip_nat.c
index 1c63960e5139..8e9d555395ff 100644
--- a/sys/netpfil/ipfilter/netinet/ip_nat.c
+++ b/sys/netpfil/ipfilter/netinet/ip_nat.c
@@ -5021,10 +5021,8 @@ ipf_nat_out(fr_info_t *fin, nat_t *nat, int natadd, u_32_t 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)
 		{