Thanks mitar for the suggestion.

Thanks thegeekofalltrades at gmail.com for the report.

Thanks Kyle Owens for the report.

Thanks raymond at adaptiv.nl for the report.

Thanks kunitoki for the report and initial patches.

See also:
https://www.gaia-gis.it/fossil/libspatialite/wiki?name=switching-to-4.0

The lack of this file breaks the test suite.

Note that GDAL 1.11 is not yet officially supported, until someone
has tested it and can confirm it has no issues with Django.

Thanks django at kerz.id.au.

Also alleviate issues with weird file names typically found in
MEDIA_ROOT directories (#23010).
Thanks Tim Graham for the review.