Add password complexity checks. The default settings require a lowercase, uppercase, number and a special character within passwords.

Co-Authored-By: T-M-A <maxim.tkachenko@gmail.com>
Co-Authored-By: Lanre Adelowo <adelowomailbox@gmail.com>
Co-Authored-By: guillep2k <18600385+guillep2k@users.noreply.github.com>
Co-Authored-By: Lauris BH <lauris@nix.lv>

* move all mail related codes from models to modules/mailer

* fix lint

* use DBContext instead Engine

* use WithContext not WithEngine

* Use DBContext instead of Engine

* don't use defer when sess.Close()

* move DBContext to context.go and add some methods

* move mailer from modules/ to services

* fix lint

* fix tests

* fix fmt

* add gitea copyright

* fix tests

* don't expose db functions

* make code clear

* add DefaultDBContext

* fix build

* fix bug

Signed-off-by: Tamal Saha <tamal@appscode.com>

* redirect to login page after successfully activating account

* force users to change password if account was created by an admin

* force users to change password if account was created by an admin

* fixed build

* fixed build

* fix pending issues with translation and wrong routes

* make sure path check is safe

* remove unneccessary newline

* make sure users that don't have to view the form get redirected

* move route to use /settings prefix so as to make sure unauthenticated users can't view the page

* update as per @lafriks review

* add necessary comment

* remove unrelated changes

* support redirecting to location the user actually want to go to before being forced to change his/her password

* run make fmt

* added tests

* improve assertions

* add assertion

* fix copyright year

Signed-off-by: Lanre Adelowo <yo@lanre.wtf>

* Replace all ctx.Handle with ctx.ServerError or ctx.NotFound

* Change Handle(403) to NotFound, avoid using macaron's NotFound

* Change EncodePasswd to HashPassword

* Create test+benchmark for HashPassword

* hide unactive on explore users and some refactors

* fix test for removed Organizations

* fix test for removed Organizations

* fix imports

* fix logic bug

* refactor the toConds

* Rename TestOrganizations to TestSearchUsers and add tests for users

* fix other tests

* fix other tests

* fix watchers tests

* fix comments and remove unused code

* restrict creating organizations based on right on user

* revert bindata.go

* reverse vendor lib

* revert goimports change

* set AllowCreateOrganization default value to true

* revert locale

* added default value for AllowCreateOrganization

* fix typo in migration-comment

* fix comment

* add coments in migration

* Remove unused custom-alphabet feature of random string generator

Fix random string generator

Random string generator should return error if it fails to read random data via crypto/rand

* Fixes variable (un)initialization mixed assign
Update test GetRandomString

* golint fixed for modules/setting

* typo fixed and renamed UNIXSOCKET to UnixSocket

- Update import paths from github.com/go-gitea to code.gitea.io
- Fix import path for travis

See https://docs.travis-ci.com/user/languages/go#Go-Import-Path

- update glide info

Both are possible on explore and admin panel

- fix delete user but repository watches are not decreased