LDAP authentication

Add LDAP authentication and probably bulk import of users from LDAP.

changed milestone to %1.0a0

added part::backend part::frontend prio::1 source::customer type::feature labels

changed milestone to %1.0a1

changed milestone to %1.0a0

mentioned in commit 02ff55f6

mentioned in commit baa17834

mentioned in commit 9bf9a5c7

mentioned in commit c223335d

closed