Log Message:
Update to 0.6.43:

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0.6.43
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* Issue #378: Restore support for Python 2.4 Syntax (regression in 0.6.42).

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0.6.42
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* External links finder no longer yields duplicate links.
* Issue #337: Moved site.py to setuptools/site-patch.py (graft of very old
  patch from setuptools trunk which inspired PR #31).

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0.6.41
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* Issue #27: Use public api for loading resources from zip files rather than
  the private method `_zip_directory_cache`.
* Added a new function ``easy_install.get_win_launcher`` which may be used by
  third-party libraries such as buildout to get a suitable script launcher.