 them with commas.
      </p><p>
       If the user name starts with a slash (<code class="literal">/</code>), the
       remainder of the name is treated as a regular expression.
       (See <a class="xref" href="functions-matching.html#POSIX-SYNTAX-DETAILS" title="9.7.3.1. Regular Expression Details">Section 9.7.3.1</a> for details of
       <span class="productname">PostgreSQL</span>'s regular expression syntax.)
      </p><p>
       A separate file containing user names and/or regular expressions can
