* Protected branches system
* Moved default branch to branches section (`:org/:reponame/settings/branches`).
* Initial support Protected Branch.
- Admin does not restrict
- Owner not to limit
- To write permission restrictions
* reformat tmpl
* finished the UI and add/delete protected branch response
* remove unused comment
* indent all the template files and remove ru translations since we use crowdin
* fix the push bug
* 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
* Correction LDAP username validation
As https://msdn.microsoft.com/en-us/library/aa366101(v=vs.85).aspx describe spaces should not be in start or at the end of username but they can be inside the username. So please check my solution for it.
* Check for zero length passwords in LDAP module.
According to https://tools.ietf.org/search/rfc4513#section-5.1.2 LDAP client should always check before bind whether a password is an empty value. There are at least one LDAP implementation which does not return error if you try to bind with DN set and empty password - AD.
* Clearing the login/email spaces at the [start/end]