Changes from Ant 1.10.16 TO Ant 1.10.17
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Fixed bugs:
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 * The JavaEnvUtils and FileUtils classes statically depend on each
   other since Ant 1.10.16 making it impossible to load JavaEnvUtils
   without loading FileUtils first causing NullPointerException for
   programmatic use on Windows. This affected Eclipse and may also
   affect other projects using Ant as a library.
   The classes can now be loaded independently again.
   Bugzilla Report 69992