CVE-2020-13254: Potential data leakage via malformed memcached keys
	  In cases where a memcached backend does not perform key validation, passing
	  malformed cache keys could result in a key collision, and potential data leakage.
	  In order to avoid this vulnerability, key validation is added to the memcached
	  cache backends.
	  CVE-2020-13596: Possible XSS via admin ForeignKeyRawIdWidget
	  Query parameters for the admin ForeignKeyRawIdWidget were not properly URL
	  encoded, posing an XSS attack vector. ForeignKeyRawIdWidget now ensures query
	  parameters are correctly URL encoded.