bpo-27485: Rename and deprecate undocumented functions in urllib.parse (GH-2205)

diff --git a/Lib/mimetypes.py b/Lib/mimetypes.py
index c86dd6d..f258721 100644
--- a/Lib/mimetypes.py
+++ b/Lib/mimetypes.py
@@ -113,7 +113,7 @@
         Optional `strict' argument when False adds a bunch of commonly found,
         but non-standard types.
         """
-        scheme, url = urllib.parse.splittype(url)
+        scheme, url = urllib.parse._splittype(url)
         if scheme == 'data':
             # syntax of data URLs:
             # dataurl   := "data:" [ mediatype ] [ ";base64" ] "," data