git: c485a58f5160 - main - UPDATING: Add an entry for the removal of in6_maxmtu

The branch main has been updated by zlei:

URL: https://cgit.FreeBSD.org/src/commit/?id=c485a58f51608e5473d8580ebd4bf9f4f42fab1a

commit c485a58f51608e5473d8580ebd4bf9f4f42fab1a
Author:     Zhenlei Huang <zlei@FreeBSD.org>
AuthorDate: 2025-05-21 10:11:03 +0000
Commit:     Zhenlei Huang <zlei@FreeBSD.org>
CommitDate: 2025-05-21 10:11:03 +0000

    UPDATING: Add an entry for the removal of in6_maxmtu
---
 UPDATING | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/UPDATING b/UPDATING
index b6597c2e11a1..c492082383f8 100644
--- a/UPDATING
+++ b/UPDATING
@@ -27,6 +27,14 @@ NOTE TO PEOPLE WHO THINK THAT FreeBSD 15.x IS SLOW:
 	world, or to merely disable the most expensive debugging functionality
 	at runtime, run "ln -s 'abort:false,junk:false' /etc/malloc.conf".)
 
+20250521:
+	Commit e64fe5ad3a23 removed in6_maxmtu and its setter in6_setmaxmtu().
+	in6_maxmtu is used to store the max IPv6 MTU of all interfaces,
+	however it does not have any in-tree consumers since the introduction
+	from the KAME project. The removal should have little impact, and the
+	max IPv6 MTU can be easily retrieved by iterating over all the attached
+	interface if 3rd party modules need it.
+
 20250515:
 	Commit 772258c89f28 changed the internal API between the nfscommon
 	and nfscl modules.  Both need to be built from updated sources.