* Set background of openIDConnect logo to white in arc-green theme

* Fixed linting off arc-green theme

Signed-off-by: Leo Maroni <git@em0lar.de>

* Revert changes of first commit (white background) and replaced the image

* Updated openid_connect (part 2)

* Update public/img/auth/openid_connect.svg

Now in one line

Co-authored-by: silverwind <me@silverwind.io>

Co-authored-by: silverwind <me@silverwind.io>
Co-authored-by: zeripath <art27@cantab.net>
Co-authored-by: Lauris BH <lauris@nix.lv>

* OAuth2: add Yandex provider (#8335)

* remove changes from locale ru-RU

* fmt modules/auth/oauth2/oauth2.go

Co-Authored-By: 6543 <6543@obermui.de>

* fix fmt

* Update templates/admin/auth/new.tmpl

* fix fmt

Co-authored-by: Lunny Xiao <xiaolunwen@gmail.com>
Co-authored-by: 6543 <6543@obermui.de>
Co-authored-by: guillep2k <18600385+guillep2k@users.noreply.github.com>
Co-authored-by: techknowlogick <matti@mdranta.net>
Co-authored-by: Lauris BH <lauris@nix.lv>

Fix #7078

* migrate gplus to google oauth2 provider. this still provides support for old gplus connections.

* Update models/oauth2.go

Co-Authored-By: Antoine GIRARD <sapk@users.noreply.github.com>

* make vendor

* add discord auth

* add vendor for discord

* fix syntax error

* make fmt

* update version of goth in use

* update markbates/goth

* Store OAuth2 session data in database

* Rename table to `oauth2_session` and do not skip xormstorage initialization error

* add google+

* sort signin oauth2 providers based on the name so order is always the same

* update auth tip for google+

* add gitlab provider

* add bitbucket provider (and some go fmt)

* add twitter provider

* add facebook provider

* add dropbox provider

* add openid connect provider incl. new format of tips section in "Add New Source"

* lower the amount of disk storage for each session to prevent issues while building cross platform (and disk overflow)

* imports according to goimport and code style

* make it possible to set custom urls to gitlab and github provider (only these could have a different host)

* split up oauth2 into multiple files

* small typo in comment

* fix indention

* fix indentation

* fix new line before external import

* fix layout of signin part

* update "broken" dependency