Upgrade to Django 1.8.11. Remove monkey patch required for v1.8.10.

cms/startup.py

@@ -11,8 +11,7 @@ from openedx.core.lib.django_startup import autostartup
 import django
 from monkey_patch import (
     third_party_auth,
-    django_db_models_options,
-    django_utils_http_is_safe_url
+    django_db_models_options
 )
 
 import xmodule.x_module
@@ -27,7 +26,6 @@ def run():
     """
     third_party_auth.patch()
     django_db_models_options.patch()
-    django_utils_http_is_safe_url.patch()
 
     # Comprehensive theming needs to be set up before django startup,
     # because modifying django template paths after startup has no effect.

common/djangoapps/monkey_patch/django_utils_http_is_safe_url.py

-"""
-Monkey patch the is_safe_url method in django.utils.http for Django 1.8.10.
-In that release, the method crashes when a bytestring, non-unicode string is passed-in
-as the url.
-Remove the monkey patch when the bug is fixed in a Django 1.8 release. Here's the bug:
-https://code.djangoproject.com/ticket/26308
-"""
-
-from django.utils import http
-from django.utils.encoding import force_text
-
-
-def patch():
-    """
-    Monkey patch the django.utils.http.is_safe_url function to convert the incoming
-    url and host parameters to unicode.
-    """
-    def create_is_safe_url_wrapper(wrapped_func):
-        # pylint: disable=missing-docstring
-        def _wrap_is_safe_url(*args, **kwargs):
-            def _conv_text(value):
-                return None if value is None else force_text(value)
-            return wrapped_func(
-                # Converted *args.
-                *tuple(map(_conv_text, args)),
-                # Converted **kwargs.
-                **{key: _conv_text(value) for key, value in kwargs.items()}
-            )
-        return _wrap_is_safe_url
-    http.is_safe_url = create_is_safe_url_wrapper(http.is_safe_url)

lms/startup.py

@@ -14,8 +14,7 @@ import logging
 import analytics
 from monkey_patch import (
     third_party_auth,
-    django_db_models_options,
-    django_utils_http_is_safe_url
+    django_db_models_options
 )
 
 import xmodule.x_module
@@ -33,7 +32,6 @@ def run():
     """
     third_party_auth.patch()
     django_db_models_options.patch()
-    django_utils_http_is_safe_url.patch()
 
     # To override the settings before executing the autostartup() for python-social-auth
     if settings.FEATURES.get('ENABLE_THIRD_PARTY_AUTH', False):

requirements/edx/base.txt

@@ -32,7 +32,7 @@ django-method-override==0.1.0
 # We need a fix to DRF 3.2.x, for now use it from our own cherry-picked repo
 #djangorestframework>=3.1,<3.2
 git+https://github.com/edx/django-rest-framework.git@3c72cb5ee5baebc4328947371195eae2077197b0#egg=djangorestframework==3.2.3
-django==1.8.10
+django==1.8.11
 djangorestframework-jwt==1.7.2
 djangorestframework-oauth==1.1.0
 edx-django-oauth2-provider==0.5.0