fixed hashlib_md5 again, thanks Paolo

gluon/globals.py

@@ -14,7 +14,7 @@ Contains the classes for the global used variables:
 
 """
 from gluon._compat import pickle, StringIO, copyreg, Cookie, urlparse, PY2, iteritems, to_unicode, to_native, \
-    unicodeT, long
+    unicodeT, long, hashlib_md5
 from gluon.storage import Storage, List
 from gluon.streamer import streamer, stream_file_or_304_or_206, DEFAULT_CHUNK_SIZE
 from gluon.contenttype import contenttype
@@ -487,7 +487,7 @@ class Response(Storage):
 
         if have_minify and ((self.optimize_css and has_css) or (self.optimize_js and has_js)):
             # cache for 5 minutes by default
-            key = hashlib.md5(repr(files)).hexdigest()
+            key = hashlib_md5(repr(files)).hexdigest()
             cache = self.cache_includes or (current.cache.ram, 60 * 5)
 
             def call_minify(files=files):
@@ -954,7 +954,7 @@ class Session(Storage):
                     cookie_expires.strftime(FMT)
 
         session_pickled = pickle.dumps(self, pickle.HIGHEST_PROTOCOL)
-        response.session_hash = hashlib.md5(session_pickled).hexdigest()
+        response.session_hash = hashlib_md5(session_pickled).hexdigest()
 
         if self.flash:
             (response.flash, self.flash) = (self.flash, None)
@@ -1141,7 +1141,7 @@ class Session(Storage):
             return True
         session_pickled = pickle.dumps(self, pickle.HIGHEST_PROTOCOL)
         response.session_pickled = session_pickled
-        session_hash = hashlib.md5(session_pickled).hexdigest()
+        session_hash = hashlib_md5(session_pickled).hexdigest()
         return response.session_hash == session_hash
 
     def _try_store_in_db(self, request, response):