shells/ksh: Update 1.0.4 --> 1.0.5

The release email outlined the following changes:

This release has a large amount of bugfixes compared to 93u+m/1.0.4. In
summary:

• Fixed various bugs causing crashes.
• Fixed many bugs in the emacs and vi line editors, in command completion, and in file name completion.
• Fixed various bugs in the handling of quotes, backslash escapes and braces when processing shell glob patterns (e.g. in pathname expansion and

'case').

• ksh now throws a panic and exits if a read error (such as an I/O error) occurs while trying to read the next command(s) from a running script.
• Fixed many bugs in 'printf' and 'print -f' built-in commands, including: . Multiple bugs causing incorrect output for relative date

specifications,

e.g., printf %T\\n 'exactly 20 months ago' now outputs a correct

result.

. More printf bugs with mix and match of % and %x$.
. A data corruption bug when using %B with 'printf -v varname'.
. A bug causing double evaluation of arithmetic expressions.

• Fixed a bug where 'unset -f commandname', executed in a subshell, hides any built-in command by the same name for the duration of that subshell.
• Fixed ${var/#/string} and ${var/%/string} (with anchored empty pattern) to work as on mksh, bash and zsh; these are no longer ineffective.
• Fixed incorrect result of array slicing ${array[@]:offset:length} where 'length' is a nested expansion involving an array.
• Command names can now end in ':' as they can on other shells.
• Fixed a spurious syntax error in compound assignments upon encountering a pair of repeated opening parentheses '(('.
• Fixed spurious syntax error in ${parameter:offset:length}: the arithmetic expressions 'offset' and 'length' may now contain the operators ( ) & |.
• Fixed a parsing bug in the declaration of .sh.math.* arithmetic functions.
• Fixed nameref self-reference loop detection for more than two namerefs.
• Several improvements to the POSIX compatibility mode.
• Many more minor and/or esoteric bugfixes.