boost::filesystem::equivalent does not work on w98

[johan-boule]

At runtime, boost::filesystem::equivalent triggers an
"unsupported operation" error on w98.

PS: Maybe for it to work, i would have had to compile
the library with some specific _WINVER, _WINDOWS, or
_WINNT preprocessor definitions?

[beman_dawes]

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Win98 isn't one of the platforms covered by the Boost
regression tests. That makes it pretty hard to debug.

If someone is willing to supply tested patches, then I'll be
happy to apply them. But since that isn't likely to happen
I'm marking this issue closed. Sorry.

--Beman