select_related() documentation is incomplete

[Joey Wilhelm]

According to the documentation here: ​http://docs.djangoproject.com/en/dev/ref/models/querysets/#id4 'depth' is the only possible argument to the select_related() function. There is no mention of the ability to specify which fields to select.

[Malcolm Tredinnick]

(In [9256]) Fixed #9390 -- Restored some documentation about select_related() that was
accidentally lost in the docs refactor.

[Malcolm Tredinnick]

(In [9260]) [1.0.X] Fixed #9390 -- Restored some documentation about select_related() that
was accidentally lost in the docs refactor.

Backport of r9256 from trunk.