Merge commit '97ef0077f06cef6f6bb93b0dae22441078647486' as 'cde/programs/dtksh/ksh93'

cde/programs/dtksh/ksh93/TODO

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+The following bugs and issues are known for ksh 93u+m 1.0.3:
+
+Memory leak when initialising associative array in subshell
+https://github.com/ksh93/ksh/issues/94
+
+command substitution botches output of non-waited-for child processes
+https://github.com/ksh93/ksh/issues/124
+
+wrong typeset -p output after unsetting multidimensional array elements
+https://github.com/ksh93/ksh/issues/148
+
+printf %T date parsing: GNU-style "ago" date spec completely broken
+https://github.com/ksh93/ksh/issues/182
+
+typeset -L/-R: string length breaks on multibyte characters
+https://github.com/ksh93/ksh/issues/189
+
+Unicode code points in $'...' strings should vary according to the locale
+https://github.com/ksh93/ksh/issues/193
+
+Variable expansion corruption in single-line function on 32-bit systems
+https://github.com/ksh93/ksh/issues/203
+
+Segfault with very large extended glob patterns
+https://github.com/ksh93/ksh/issues/207
+
+process substitution cannot be part of a larger argument
+https://github.com/ksh93/ksh/issues/215
+
+Nested compound assignment misparsed in $(...) command substitution
+https://github.com/ksh93/ksh/issues/269
+
+Builtins don't handle I/O errors
+https://github.com/ksh93/ksh/issues/313
+
+bug in printf when %b and %x$ are used in same format
+https://github.com/ksh93/ksh/issues/324
+
+Associative arrays of various types fail to be unset
+https://github.com/ksh93/ksh/issues/345
+
+Variable with discipline function in subshell causes memory leak
+https://github.com/ksh93/ksh/issues/404
+
+Memory leak(s) when modifying PATH in various contexts
+https://github.com/ksh93/ksh/issues/405
+
+Discipline function .unset only called once for array subscripts
+https://github.com/ksh93/ksh/issues/419
+
+Function autoload apparently broken on DragonFly BSD
+https://github.com/ksh93/ksh/issues/432
+
+confusing behaviour of backreferences with alternation
+https://github.com/ksh93/ksh/issues/447
+
+Alias expansion loop not detected in command substitution
+https://github.com/ksh93/ksh/issues/458
+
+Make KEYBD trap handling code multibyte-aware
+https://github.com/ksh93/ksh/issues/460
+
+$LINENO incorrect after compound assignment
+https://github.com/ksh93/ksh/issues/484
+
+Shell quoting within bracket patterns has no effect
+https://github.com/ksh93/ksh/issues/488
+
+OPTIND not initialised correctly on Solaris/SPARC when compiled with gcc
+https://github.com/ksh93/ksh/issues/515