feat:Extra options in ldap filter

* feat(CLI): show LDAP attributes
* test(auth): check complex LDAP filter
* feat(auth): add LDAP posix users and groups
* fix(auth): match legacy SSHA

taken from 75d77433

 by @jtorilo
but I am not sure about the OR part, so it just requires a match
to user name and filter

issue #1083

Co-authored-by: Josep Martin <jmartin@epsem.upc.edu>