[1.4.x] Fixed #19902 -- backport of as_view docs
[1.4.x] Fixed #19728 - Updated API stability doc to reflect current meaning of "stable".

Backport of 132d5822b0 from master.
[1.4.x] Fixed #19911 - Updated generic view links.

Thanks marc@ for the report.
[1.4.x] Fixed #18144 -- Restored compatibility with SHA1 hashes with empty salt.

Thanks dahool for the report and initial version of the patch.

Backport of 633d8de from master.
Merge pull request #1 from django/stable/1.4.x

Stable/1.4.x