What does this sh script line do?

[Jon Albers]

In trying to get Cnews to compile on our UNISYS 5000/95, I have come upon
a problem with the shell scripts -- several of them have lines like:


. ${NEWSCONFIG-/usr/lib/news/bin/config}

It blows up on this line with the error 'Bad substitution', however, under
SCO UNIX, it work just fine.  What is it supposed to be doing?

								Jon

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