Bug 829213 - unhashed#user#password visible after changing password
https://bugzilla.redhat.com/show_bug.cgi?id=829213
Bug 830001 - unhashed#user#password visible after changing password [rhel-6.3]
https://bugzilla.redhat.com/show_bug.cgi?id=830001
Bug Description: unhashed#user#password is skipped to check acl
in acl_check_mod.
Fix Description: Set SLAPI_ATTR_FLAG_NOUSERMOD to unhashed#user#
password schema. It makes clients' modifying the unhashed password
fail by UNWILLING TO PERFORM.