http decorators docs doesn't provide import path

[slinkp@…]

The various decorators documented at ​http://docs.djangoproject.com/en/dev/topics/http/decorators/ actually live in different modules but only require_http_methods has a documented import path.

For example, in order to use gzip_page(), you have to import it from from django.views.decorators.gzip.
The import is not documented.
Likewise, vary_on_headers and vary_on_cookie actually live in django.views.decorators.vary.

[Gabriel Hurley]

In [15671]:

Fixed #15395 -- Documented the modules/import paths for the various decorators in django.views.decorators. Thanks to slinkp for the report.

[Gabriel Hurley]

In [15672]:

[1.2.X] Fixed #15395 -- Documented the modules/import paths for the various decorators in django.views.decorators. Thanks to slinkp for the report.

Backport of [15671] from trunk.