Motivation:
When users' /tmp is noexec, NativeLibraryLoader logs a message informing
them how to fix the problem by setting a system property. However, if
Netty has been shaded that message will tell them to set the un-shaded
system property name, which won't work.
Modifications:
Change the code to let shading tools rename the native.workdir property
name reference within user-visible log messages.
Notably, debug logs were _not_ changed, as there's many debug statements
including a variety of property names. Fixing them would be a much more
invasive change and have limited benefit.
Result:
The users will see the correctly-named system property to set if they
are using a noexec /tmp.
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