doc/3RDPARTY: update bind

BIND 9.20.18 is out.

Also, switch URL to https:// bind and Postfix.

Author: taca

doc/3RDPARTY

@@ -1,4 +1,4 @@
-#	$NetBSD: 3RDPARTY,v 1.2158 2026/01/18 17:40:33 christos Exp $
+#	$NetBSD: 3RDPARTY,v 1.2159 2026/01/21 14:13:56 taca Exp $
 #
 # This file contains a list of the software that has been integrated into
 # NetBSD where we are not the primary maintainer.
@@ -128,11 +128,11 @@ bc includes dc, both of which are in the NetBSD tree.
 
 Package:	bind [named and utils]
 Version:	9.20.11/MPL
-Current Vers:	9.20.11/MPL
+Current Vers:	9.20.18/MPL
 Maintainer:	ISC
 Archive Site:	ftp://ftp.isc.org/isc/bind9/
-Home Page:	http://www.isc.org/software/bind/
-Date:		2025-07-17
+Home Page:	https://www.isc.org/software/bind/
+Date:		2026-01-21
 Mailing List:	https://lists.isc.org/mailman/listinfo/bind-announce
 Mailing List:	https://lists.isc.org/mailman/listinfo/bind-users
 Responsible:	christos
@@ -1293,7 +1293,7 @@ Version:	3.10.1
 Current Vers:	3.10.7
 Maintainer:	Wietse Venema <wietse@porcupine.org>
 Archive Site:
-Home Page:	http://www.postfix.org/
+Home Page:	https://www.postfix.org/
 Date: 		2026-01-18
 Mailing List:	postfix-users@postfix.org
 Responsible:	christos