auto_deleted   (on|off)    auto delete queue when set to 'on', when there are no consumers
delivery_mode  (number)    set to '1' for non-persistent or '2' for persistent queue
queue_dir      (path)      staging dir for undelivered messages e.g. '/home/events'
queue_limit    (number)    maximum limit for undelivered messages, defaults to '100000'
comment        (sentence)  optionally add a comment to this setting
```

Or environment variables

```
KEY:

		<version>15.2.0</version>
		<relativePath />
	</parent>
	<properties>
		<!-- DEB & RPM build -->
		<packaging.fess.home.dir>/usr/share/fess</packaging.fess.home.dir>
		<packaging.fess.app.dir>${packaging.fess.home.dir}/app</packaging.fess.app.dir>
		<packaging.fess.bin.dir>${packaging.fess.home.dir}/bin</packaging.fess.bin.dir>
		<packaging.fess.conf.dir>/etc/fess</packaging.fess.conf.dir>

ldap.attr.employeeNumber=employeeNumber
# LDAP attribute for mail.
ldap.attr.mail=mail
# LDAP attribute for telephone number.
ldap.attr.telephoneNumber=telephoneNumber
# LDAP attribute for home phone.
ldap.attr.homePhone=homePhone
# LDAP attribute for home postal address.
ldap.attr.homePostalAddress=homePostalAddress
# LDAP attribute for labeled URI.
ldap.attr.labeledURI=labeledURI
# LDAP attribute for room number.