[PROJ] PROJ 6.0.0RC3

[Even Rouault]

> The C++ unit tests also fail on io.wkt_parsing_with_parenthesis. I've been
> unable to determine the cause. Presumably the use of non-ASCII characters in
> hexadecimal form. Not sure why this would be netBSD specific... But this is
> is really a non-critical test.

Actually was a misuse of isspace() on non-ASCII characters. Could have shown 
up on other platforms as well. Just fixed in the
https://github.com/OSGeo/proj.4/pull/1293 as well

Now 'gmake check' passes on netBSD 8

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