Add _app_openssh for variable storage.
Move pf variables to _system_pf.
Add _app_openldap_server_package promise.
Add _app_openldap_server_service promise.
Fix commands for openldap server.
Add _app_nslcd promises.
Add _app_nslcd and _app_nslcd_config.
Set permissions on nslcd.conf.
Add _app_openldap variables.
Add _system_pam promise.
Add _system_freebsd_pam_ldap promise.
Use _system_pam in _system_freebsd_pam_ldap.