Deprecated LDAP config syntax broken on 9.4.2 and up
Installations using deprecated LDAP config syntax from pre-GitLab 7.4 may have broken LDAP connections starting with 9.4.2.
This is a showstopper for those affected since their users cannot log in, see https://gitlab.com/gitlab-org/gitlab-ee/issues/3082#note_37284050. But the syntax has been deprecated for awhile, so I'm not sure what exactly should be done here.