-h/--help option.
</para>
<para>
- If the <literal>filename</literal> parameter is a directory, then all files in
- the directory are loaded in alphabetical order.
+ Include statements support the usual shell wildcard symbols
+ (<literal>*,?,[]</literal>). Having no matches for an include statement is not
+ an error, if wildcard symbols are used in the include statement. This allows having
+ potentially empty include directories for statements like
+ <literal>include "/etc/firewall/rules/*"</literal>. The wildcard matches are
+ loaded in alphabetical order. Files beginning with dot (<literal>.</literal>) are
+ not matched by include statements.
</para>
</refsect2>
<refsect2>