read -Z as an alias for IFS= read -rd ''?

[adavies42]

Now that ksh supports null-terminated read, it would be convenient to have a single option to trigger it, rather than having to remember to set three different things correctly. I suggest that a -Z option be added to read which would set IFS to the empty string for the duration of the command and have the same effect as using the -r and -d '' options. (I chose -Z since -z is already used by zsh's read for something else; -Z is currently unused in both bash and zsh.)