This is needed to update net/rubygem-net-ldap.
Entries in the redmine issue tracker and experience in the Foreman and Katello projects with the ldap_fluff gem suggest that this is safe to go, but I don't have a redmine with LDAP to actually test this.
Proposed commit message:
www/redmine: allow newer net-ldap versions Approved by: swills (mentor), mat (mentor)