[1.4.x] Fixed #18301 -- Fixed url name in password reset example.

Thanks nicknnn for the report.
[1.4.x] Fixed #18019 -- Use threaded runserver only when database supports it.
[1.4.x] Updated docs/intro/whatsnext.txt to reference Git instead of SVN
[1.4.x] Fixed #18135 -- Close connection used for db version checking

On MySQL when checking the server version, a new connection could be
created but never closed. This could result in open connections on
server startup.

Backport of 4423757c0c50afbe2470434778c8d5e5b4a70925.
[1.4.X] Fixed #18379 -- Made the sensitive_variables decorator work with object methods.
[1.4.x] readd imports deleted in 4d2fdd
Merge pull request #109 from apollo13/fix4d2fdd

Fix test error.
[1.4.x] Rewrote security.txt SSL docs, noting SECURE_PROXY_SSL_HEADER.

Backport of 0199bdc0b from master
[1.4.x] Noted that SECURE_PROXY_SSL_HEADER is needed by CSRF protection.

Both false positives and false negatives of HttpRequest.is_secure can be
dangerous.

Backport of 840ffd80ba from master
[1.4.X] Replaced documentation snippets using "gender" with less sensitive examples.

Backport of [7edf231] from master.
[1.4.x] Added more explicit warnings about unconfigured reStructured Text usage in docs.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@17915 bcc190cf-cafb-0310-a4f2-bffc1f526a37

Backport of 718f149b from master
[1.4.X] Fixed #18369 - Fixed argument name in render() function; thanks qsolo825@ for the report.

Backport of 1cf8287e3a from master
[1.4.X] Fixed #17511 - Removed reference to deprecated "reset" management command in FAQ; thanks voxpuibr@ for the report.

Backport of c8928b91b5 from master
[1.4.x] Fixed #18528 -- Fixed custom field value_to_string example

Thanks anuraguniyal for the report.
[1.4.X] Fixed #17168 - Noted TransactionMiddleware only works with "default" database alias.

Thanks codeinthehole for the draft patch.

Backport of 5d81ad1af1 from master
[1.4.X] Fixed #18145 -- Improved documentation of unique_together type fields

Backport of 55ffcf8e7b from master
[1.4.X] Fixed #17705 - Updated TabularInline image and doc in tutorial 2.

Thanks xbito for the draft patch.

Backport of c5fb8299ef from master
[1.4.X] Fixed #18493 - Added instructions to locate the Django source files to the t

Thanks Claude Paroz for the draft patch.

Backport of c68f4c514c from master
[1.4.X] Fixed #16882 - Clarified why one should not use 'init_command' after initial database creation.

Backport of 9974069620 from master
[1.4.X] Fixed #17436 - Added warning about overriding Model.__init__()

Thanks zsiciarz for the draft patch.

Backport of 7313468f85 from master