update to mutt-1.14.3

Fix possible IMAP man-in-the-middle attack. No credentials are exposed,
but could result in unintended emails being "saved" to an attacker's
server. The $ssl_starttls quadoption is now used to check for an
unencrypted PREAUTH response from the server.

(the release also had a gnutls fix, but we don't use gnutls in the port).

mail/mutt/Makefile

@@ -1,9 +1,8 @@
-# $OpenBSD: Makefile,v 1.133 2020/05/26 12:11:40 sthen Exp $
+# $OpenBSD: Makefile,v 1.134 2020/06/15 11:47:21 sthen Exp $
 
 COMMENT=	tty-based e-mail client
 
-DISTNAME=	mutt-1.14.2
-#PGPSIGFILES=	${DISTNAME}${EXTRACT_SUFX}.asc
+DISTNAME=	mutt-1.14.3
 EPOCH=		3
 
 CATEGORIES=	mail

mail/mutt/distinfo

@@ -1,2 +1,2 @@
-SHA256 (mutt-1.14.2.tar.gz) = 4i9wDoxX+8QaZCv+7u0a3KBuYYeIfDlhSlw404GmrDE=
-SIZE (mutt-1.14.2.tar.gz) = 5222938
+SHA256 (mutt-1.14.3.tar.gz) = sVVt8zM7DYdJJszF0D2tvQ9oDzAvnUTrrh7DxMJmpHE=
+SIZE (mutt-1.14.3.tar.gz) = 5003987