shells/ksh93: update to ksh93-1.0.3.

Submmited by Paolo Vincenzo Olivo through private e-mail.

This a stability update incorporating crucial bug fixes.

Changes since version 1.0.1:

# Release 1.0.3

This point release mainly fixes the following:
- A bug in history expansion (set -H) where any use of the history
  comment character caused processing to be aborted as if it were an
  invalid history expansion. Affected e.g. 'echo ${#v}'.
- A bug in command line options processing that caused short-form option
  equivalents on some built-in commands to be ignored after one use,
  e.g., the new read -a equivalent of read -A.
- Ksh freezing or using excessive memory if HISTSIZE is assigned a
  pathologically large value.
- A bug that caused ksh in the vi editor mode to crash or produce
  invalid completions if ESC = was used at the beginning of a line.

# Release 1.0.2

This release fixes the interactive shell crashing when one of the
predefined aliases (currently 'history' and 'r') is redefined, whether
from a profile/kshrc script or manually. This crash occurred in two
scenarios:

1. when redefining and then unsetting a predefined alias;

2. when redefining a predefined alias and then executing a shell script
that does not begin with a #! path.

shells/ksh93/Makefile

@@ -1,6 +1,6 @@
-# $NetBSD: Makefile,v 1.4 2022/08/09 06:37:32 pin Exp $
+# $NetBSD: Makefile,v 1.5 2022/09/04 14:35:34 pin Exp $
 
-DISTNAME=	ksh93-1.0.1
+DISTNAME=	ksh93-1.0.3
 CATEGORIES=	shells
 MASTER_SITES=	${MASTER_SITE_GITHUB:=ksh93/}
 GITHUB_PROJECT=	ksh

shells/ksh93/distinfo

@@ -1,6 +1,6 @@
-$NetBSD: distinfo,v 1.3 2022/08/09 06:37:32 pin Exp $
+$NetBSD: distinfo,v 1.4 2022/09/04 14:35:34 pin Exp $
 
-BLAKE2s (ksh93-1.0.1.tar.gz) = a585bb90714433bf1d6cc862e54c482f9e4abc5464a3fc6437e898a58d89a0c6
-SHA512 (ksh93-1.0.1.tar.gz) = c12c5b7d0a429b121e28707fbf21848a25a7b211761b53fc1d3cc68bba81f856cbf216b8bfe91216496e07f9484bc015b41e6ae6cf17cc424f5c64b873928b2c
-Size (ksh93-1.0.1.tar.gz) = 2107148 bytes
+BLAKE2s (ksh93-1.0.3.tar.gz) = 0a74d52ac2d32164038d377018290ca653ca1e3f0a0d58481adbcf433566618e
+SHA512 (ksh93-1.0.3.tar.gz) = 9d6e664bc6c8d102ba09e692d057b9546b07ba3ecb060449df6648e7c99f8dfd670401e6fcf34f6f3de13338a3c31c09596344931ccfdf4cd4e49eabdf005c23
+Size (ksh93-1.0.3.tar.gz) = 2110771 bytes
 SHA1 (patch-src_lib_libast_features_syscall) = b40006e5076d8b96719d4021fbadbdfcc709aad2