added __all__ lists to a number of Python modules
added test script and expected output file as well
this closes patch 103297.
__all__ attributes will be added to other modules without first submitting
a patch, just adding the necessary line to the test script to verify
more-or-less correct implementation.
diff --git a/Lib/cgi.py b/Lib/cgi.py
index 6d59051..0e808a5 100755
--- a/Lib/cgi.py
+++ b/Lib/cgi.py
@@ -34,6 +34,8 @@
 import UserDict
 from StringIO import StringIO
 
+__all__ = ["MiniFieldStorage","FieldStorage","FormContentDict",
+           "SvFormContentDict","InterpFormContentDict","FormContent"]
 
 # Logging support
 # ===============