This change to config-bot.h is for z/OS. The C language people from
IBM have done some "nasty" things wherein some non-existant standard
functions are deliberately misdefined to cause a compile error.
However their method does not cause an "preprocessor only" compile
to fail. This cause the ./configure to misbehave and set some
facilities as existing when they do not. This causes later compile
errors.
Merge remote-tracking branch 'github/bash-4.2-zos' into bash-4.2-zos
Merge remote-tracking branch 'github/bash-4.2-zos' into bash-4.2-zos