D55382.id.diff
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	diff --git a/share/man/man4/ip6.4 b/share/man/man4/ip6.4
	--- a/share/man/man4/ip6.4
	+++ b/share/man/man4/ip6.4
	@@ -28,7 +28,7 @@
	.\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	.\" SUCH DAMAGE.
	.\"
	-.Dd July 24, 2022
	+.Dd August 1, 2026
	.Dt IP6 4
	.Os
	.Sh NAME
	@@ -502,6 +502,16 @@
	.Dv IPV6_LEAVE_GROUP ,
	and
	.Dv IPV6_JOIN_GROUP .
	+.Pp
	+In addition, the
	+.Dv IPV6_JOIN_GROUP ,
	+and
	+.Dv IPV6_LEAVE_GROUP
	+socket options will accept IPv4-mapped multicast group
	+addresses for Any-Source Memberships (ASM) only.
	+This is an extension to the behaviour for unicast IPv4-mapped
	+address support described in Section 3.7 of RFC 3493,
	+which has been adopted by many network applications.
	.Ss Raw Sockets
	Raw IPv6 sockets are connectionless and are normally used with the
	.Xr sendto 2
	@@ -729,3 +739,12 @@
	.Dv IPV6_PORTRANGE
	socket option and the conflict resolution rule are not defined in the
	RFCs and should be considered implementation dependent.
	+.Sh HISTORY
	+The extensions for
	+.Dv IPV6_JOIN_GROUP
	+and
	+.Dv IPV6_LEAVE_GROUP
	+to accept IPv4 group addresses in RFC 4291 IPv4-mapped format were added in
	+.Fx 16.0 .
	+These extensions were never formally defined in RFC 3493, and RFC 4038 did not
	+define any migration mechanism for multicast groups specified in this way.