[ANN] ksh 93u+m/1.0.3

[Martijn Dekker]

Announcing: KornShell 93u+m/1.0.3
https://github.com/ksh93/ksh

This is the third bugfix release in the ksh 93u+m/1.0 series. Many thanks to
all contributors for their hard work! Compared to an unpatched ksh 93u+
2012-08-01, this release has roughly a thousand bugs fixed. It incorporates
a fair number of enhancements as well.

### CONTRIBUTORS ###

Work on ksh 93u+m started in May 2020.
Main developers: Martijn Dekker, Johnothan King, hyenias

Direct contributors: Andy Fiddaman, Anuradha Weeraman, atheik, Chase,
Govind Kamat, Harald van Dijk, K. Eugene Carlson, Lev Kujawski, Marc
Wilson, Ryan Schmidt, Sterling Jensen, Trey Valenta, Vincent Mihalkovic

Also includes backported contributions by: David Korn, Glenn Fowler,
Lefteris Koutsofios, Siteshwar Vashisht, Kurtis Rader, Roland Mainz,
Finnbarr P. Murphy, Lijo George, OpenSUSE ksh 93u+ patch authors, Red Hat
ksh 93u+ path authors, Solaris ksh 93u+ patch authors, Debian ksh 93u+
patch authors, Apple ksh 93u+ patch authors, Graphviz maintainers

Many fixes have also been backported from the AT&T 93v- beta as well as
the former ksh2020 project lead by Kurtis Rader and Siteshwar Vashisht;
we appreciate and benefit from their work. Many thanks also to Siteshwar
for graciously donating his 'ksh93' GitHub organisation account!

### HOW TO GET IT ###

Please download the source code tarball from our GitHub releases page:
https://github.com/ksh93/ksh/releases
To build, follow the instructions in README.md or src/cmd/ksh93/README.

Or ask your distribution package manager to upgrade ksh93 to this version.

### HOW TO GET INVOLVED ###

To report a bug, please open an issue at our GitHub page (see above).
Alternatively, email me at mar...@inlv.org with your report.
To get involved in development, read the brief policy information in
README.md and then jump right in with a pull request or email a patch.
See the TODO file in the top-level directory for a to-do list.

### MAIN CHANGES between ksh 93u+m 1.0.2 and 1.0.3 ###

This point release fixes the following:
- An old 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.
- 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.

### MAIN CHANGES between ksh 93u+m 1.0.1 and 1.0.2 ###

This bugfix 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.

### MAIN CHANGES between ksh 93u+m 1.0.0 and 1.0.1 ###

This is an urgent bugfix release that removes an incorrect exec
optimization that was capable of terminating the execution of scripts
prematurely in certain corner cases. It is known to make the build scripts
of GNU binutils produce corrupted results if ksh is used as /bin/sh.
See https://github.com/ksh93/ksh/issues/507 for more information.