* Refactor repo.isBare to repo.isEmpty #5629

Signed-off-by: Andrew Thornton <art27@cantab.net>

* Remove Sync call

* fix units permission problems

* fix some bugs and merge LoadUnits to repoAssignment

* refactor permission struct and add some copyright heads

* remove unused codes

* fix routes units check

* improve permission check

* add unit tests for permission

* fix typo

* fix tests

* fix some routes

* fix api permission check

* improve permission check

* fix some permission check

* fix tests

* fix tests

* improve some permission check

* fix some permission check

* refactor AccessLevel

* fix bug

* fix tests

* fix tests

* fix tests

* fix AccessLevel

* rename CanAccess

* fix tests

* fix comment

* fix bug

* add missing unit for test repos

* fix bug

* rename some functions

* fix routes check

* Add configuration flag SSH_EXPOSE_ANONYMOUS

If this flag (default True) is set to false, the SSH clone URL will only be exposed if the current user is signed in.

* Default SSH exposure set to false

To match GitHub and for security reasons, SSH URL exposure is disabled by default.
In addition to that. minor code changes have been applied.

Signed-off-by: Stefan Kalscheuer <stefan@stklcode.de>

* Add integration tests

* Hide clone button neither HTTP and SSH is enabled

Signed-off-by: Stefan Kalscheuer <stefan@stklcode.de>

This commit improves templates readability, since all of them use consistent
indent with all template command blocks indented too.

1. Indents both HTML containers such as <div>, <p> and Go HTML template blocks
   such as {{if}} {{with}}

2. Cleans all trailing white-space

3. Adds trailing last line-break to each file

Conflicts:
	modules/setting/setting.go

Conflicts:
	templates/repo/release/list.tmpl
	templates/user/dashboard/dashboard.tmpl

Conflicts:
	routers/repo/setting.go

Removed trailing whitespaces with

```sh
for file in `grep -r " $" * | cut -d : -f 1 | sort | uniq | grep -v " "`; do sed -i 's/[ \t]*$//' $file; done
```

and some handwork.