RELNOTES, UPDATING: Document Secure RPC DES removal

RELNOTES

@@ -10,6 +10,12 @@ newline.  Entries should be separated by a newline.
 
 Changes to this file should not be MFCed.
 
+7ac276298b72, 7b8c9de17448, 1271b1d747a7, 9dcb984251b3:
+	Support for Secure RPC DES authentication has been removed.  This
+	includes publickey(5), keyserv(8) and the rpc_secure(3) routines which
+	rely on keyserv.  The libc symbols are still present for backward
+	compatibility, but all functions will unconditionally return an error.
+
 37b2cb5ecb0f:
 	Add support to VOP_COPY_FILE_RANGE() for block cloning.
 	At this time, ZFS is the only local file system that supports

UPDATING

@@ -27,6 +27,13 @@ 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".)
 
+20250810:
+	Support for Secure RPC DES authentication has been removed.
+	The keyserv(8) daemon was already removed, but support for it in libc
+	has also been removed, so if you somehow still had keyserv installed,
+	it will now stop working.  There is no workaround for this.  Removing
+	DES is considered a feature.
+
 20250808:
 	The CLEAN option has been switched back from default-off to
 	default-on.  This reverts the 20240729 change below.