Fixed #17767 - Added signed cookie session backed to session engine settings docs; thanks Preston Holmes.
Fixed #17767 - Added signed cookie session backed to session engine settings docs; thanks Preston Holmes.

git-svn-id: 554f83ef17aa7291f84efa897c1acfc5d0035373@17606 bcc190cf-cafb-0310-a4f2-bffc1f526a37

svn2github/django,svn2github/django,svn2github/django