Indexed search of repository contents (for default branch only)

* Add wrapping to long diff lines to fix #1827

* Fix  css class and make changes to source (less) files

* Fix wrong space indentation

* Fix indentation inconsistencies and remove very old WebKit workaround

* Add repo type option to /api/repo/search

* Add tests and fix result of collaborative filter in specific condition

* Fix/optimize search & tests

* Improve integration tests

* Fix lint errors

* Fix unit tests

* Change and improve internal implementation of repo search

* Use NonexistentID

* Make search api more general

* Change mirror and fork search behaviour

* Fix tests & typo in comment

* Show Sendmail settings on admin config page

* Remove unecessary if statement

* Add checks for commits with missing author and time

* Fix validate commits with emails if it has no Author

* cleanup old comments for ed25519

These comments were added when x/crypto/ed25519 could not yet handle
ed25519. It does now, so it should be removed.
Also the key type is now replaced with the proper constant.

* move the minimum key size config before the check

This moves the actual config lookup before any check is done. This
avoids problems with calling to ssh-keygen which doesn't support the
expected output format and returning an error, when the check is disabled.

* Add commit count caching

* Small refactoring

* Add different key prefix for refs and commits

* Add configuratuion option to allow to change caching time or disable it

* Add branch overiew page

* fix changed method name on sub menu

* remove unused code

* Add support for extra sendmail arguments

* Sendmail args to exec.command should be a list

* Add go-shellquote package

* Use go-shellquote lib for parsing Sendmail args

* Only parse if sendmail is configured

MAX_GIT_DIFF_LINE_CHARACTERS was updated in #1845 but the corresponding
default value of MaxGitDiffLineCharacters was not changed. This can lead
to inconsistencies.

* 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

* Use identicon image for default gravatar.

* Fixed tests.

* Move swagger interface under /api/v1

* Update swagger-ui

* Add /api/swagger and prepare for multiple api version

* Update test links

* Fix footer link

* Configurable SSH cipher suite

* Update configuration file comment

* Add default in settings loading code

* Fix fmt and log messsage

* Remove default from code as this could probably might not be good idea

* use buffersize to reduce database connection when iterate

* fix typo

* add default value on app.ini comment

* Fix and remove FIXME

* Respect membership visibility

* Fix/rewrite searchRepositoryByName function

* Add unit tests

* Add integration tests

* Remove Searcher completely

* Remove trailing space

Signed-off-by: Jonas Franz <info@jonasfranz.software>

* merge password and 2fa page on user settings

* Fix PR, milestone and label functionality if issue unit is disabled or not assigned to user

* Fix multi-actions in PR page

* Change error message

* Fix comment update and delete functionality in PR

* fix plain readme didn't render correctly on repo home page

* fix missing render

* remove unused template variables

* Integration test for activity page

* Small code refactoring for acitvity page

* Move activity stats calculation logic to model

* Create new branch from branch selection dropdown and rewrite it to VueJS

* Make updateLocalCopyToCommit as not exported

* Move branch name validation to model

* Fix possible race condition

* provide both possible authentication solutions

Signed-off-by: David Schneiderbauer <dschneiderbauer@gmail.com>

* Fix so that user can still fork his own repository to his organizations

* Fix to only use owned organizations

* Add integration test for forking own repository to owned organization

* Add Activity page to repository

* Add request data for activity

* Add issue data for activity

* Add user unit right checks

* Add releases to activity

* Log repository unit loading error

* Allow custom SSH user in UI for built-in SSH server (#2617)

* Some fixes

* Did make fmt

* Updated according to review

- Renamed config to BUILTIN_SSH_SERVER_USER
- Removed unnecessary default string value for config item

* Updated according to review

* Fixed some minor issues

* remove orgnization watch repositories

* fix migration

* fix typo and missing change

* remove unused code

* Use -dev (1.3.0-dev is less than 1.3.0, according to semver)

* Use fake version for testing purpose

* Remove redudant functions and code