Prepare collections module for pure python code entries.
diff --git a/Modules/collectionsmodule.c b/Modules/_collectionsmodule.c
similarity index 99%
rename from Modules/collectionsmodule.c
rename to Modules/_collectionsmodule.c
index f98bd49..c37f9ac 100644
--- a/Modules/collectionsmodule.c
+++ b/Modules/_collectionsmodule.c
@@ -1337,11 +1337,11 @@
 ");
 
 PyMODINIT_FUNC
-initcollections(void)
+init_collections(void)
 {
 	PyObject *m;
 
-	m = Py_InitModule3("collections", NULL, module_doc);
+	m = Py_InitModule3("_collections", NULL, module_doc);
 	if (m == NULL)
 		return;