Assorted xreadlines problems:

Wasn't built on Windows; not in config.c either.
    Module init function missing DL_EXPORT magic.
    test_xreadline output file obviously wrong (started w/ "test_xrl").
    test program very unclear about what was expected.

Modules/xreadlinesmodule.c

@@ -109,7 +109,7 @@ static PyMethodDef xreadlines_methods[] = {
 	{NULL, NULL}
 };
 
-void
+DL_EXPORT(void)
 initxreadlines(void)
 {
 	PyObject *m;