Process.exec with the linux posix_spawn mode has a bug

[Martin Buchholz]

>
>
>> I tried hard back in 2005 to provide pretty good java-level diagnostics
>> when subprocess starting failed somehow (see WhyCantJohnnyExec) .  At least
>> the errno did get reported.
>>
>>
> I know your code. For many years I wondered who Johnny is :)
>

https://en.wikipedia.org/wiki/Rudolf_Flesch

I should have spelled that WhyJohnnyCantExec