Move English documentation to folder en_US

doc/en_US/ldap-group-sync.markdown

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+LDAP Group Synchronization
+==========================
+
+Requirements
+------------
+
+- Have LDAP authentication properly configured
+- Use a LDAP server that supports `memberOf` or `memberUid` (PosixGroups)
+
+Define automatically user roles based on LDAP groups
+----------------------------------------------------
+
+Use these constants in your config file:
+
+- `LDAP_GROUP_ADMIN_DN`: Distinguished names for application administrators
+- `LDAP_GROUP_MANAGER_DN`: Distinguished names for application managers
+
+### Example for Active Directory:
+
+```php
+define('LDAP_GROUP_ADMIN_DN', 'CN=Kanboard Admins,CN=Users,DC=kanboard,DC=local');
+define('LDAP_GROUP_MANAGER_DN', 'CN=Kanboard Managers,CN=Users,DC=kanboard,DC=local');
+```
+
+- People member of "Kanboard Admins" will have the role "Administrator"
+- People member of "Kanboard Managers" will have the role "Managers"
+- Everybody else will have the role "User"
+
+### Example for OpenLDAP with Posix Groups:
+
+```php
+define('LDAP_GROUP_BASE_DN', 'ou=Groups,dc=kanboard,dc=local');
+define('LDAP_GROUP_USER_FILTER', '(&(objectClass=posixGroup)(memberUid=%s))');
+define('LDAP_GROUP_ADMIN_DN', 'cn=Kanboard Admins,ou=Groups,dc=kanboard,dc=local');
+define('LDAP_GROUP_MANAGER_DN', 'cn=Kanboard Managers,ou=Groups,dc=kanboard,dc=local');
+```
+
+You **must define the parameter** `LDAP_GROUP_USER_FILTER` if your LDAP server use `memberUid` instead of `memberOf`.
+All parameters of this example are mandatory.
+
+Automatically load LDAP groups for project permissions
+------------------------------------------------------
+
+This feature allows you to sync automatically LDAP groups with Kanboard groups.
+Each group can have a different project role assigned.
+
+On the project permissions page, people can enter groups in the auto-complete field and Kanboard can search for groups with any provider enabled.
+
+If the group doesn't exist in the local database, it will be automatically synced.
+
+- `LDAP_GROUP_PROVIDER`: Enable the LDAP group provider
+- `LDAP_GROUP_BASE_DN`: Distinguished names to find groups in LDAP directory
+- `LDAP_GROUP_FILTER`: LDAP filter used to perform the query
+- `LDAP_GROUP_ATTRIBUTE_NAME`: LDAP attribute used to fetch the group name
+
+### Example for Active Directory:
+
+```php
+define('LDAP_GROUP_PROVIDER', true);
+define('LDAP_GROUP_BASE_DN', 'CN=Groups,DC=kanboard,DC=local');
+define('LDAP_GROUP_FILTER', '(&(objectClass=group)(sAMAccountName=%s*))');
+```
+
+With the filter given as example above, Kanboard will search for groups that match the query.
+If the end-user enter the text "My group" in the auto-complete box, Kanboard will return all groups that match the pattern: `(&(objectClass=group)(sAMAccountName=My group*))`.
+
+- Note 1: The special characters `*` is important here, **otherwise an exact match will be done**.
+- Note 2: This feature is only compatible with LDAP authentication configured in "proxy" or "anonymous" mode
+
+[More examples of LDAP filters for Active Directory](http://social.technet.microsoft.com/wiki/contents/articles/5392.active-directory-ldap-syntax-filters.aspx)
+
+### Example for OpenLDAP with Posix Groups:
+
+```php
+define('LDAP_GROUP_PROVIDER', true);
+define('LDAP_GROUP_BASE_DN', 'ou=Groups,dc=kanboard,dc=local');
+define('LDAP_GROUP_FILTER', '(&(objectClass=posixGroup)(cn=%s*))');
+```