When reading the file, option names were not passed through

gvanrossum · gvanrossum · commit 4126736791eb · 2000-09-25T14:42:33.000Z
self.optionxform(), which (in the default case) caused options spelled
with opper case letters in their name to be inaccessible.  Reported by
"Todd R. Palmer" &lt;t2palmer@bellsouth.net&gt; on
activepython@listserv1.ActiveState.com.
diff --git a/Lib/ConfigParser.py b/Lib/ConfigParser.py
@@ -440,7 +440,7 @@ def __read(self, fp, fpname):
                         # allow empty values
                         if optval == '""':
                             optval = ''
-                        cursect[optname] = optval
+                        cursect[self.optionxform(optname)] = optval
                     else:
                         # a non-fatal parsing error occurred.  set up the
                         # exception but keep going. the exception will be
