hentication">Section 21.5</a> for details.
         </p></dd><dt><span class="term"><code class="literal">gss</code></span></dt><dd><p>
          Use GSSAPI to authenticate the user. This is only
          available for TCP/IP connections. See <a class="xref" href="gssapi-auth.html" title="21.6. GSSAPI Authentication">Section 21.6</a> for details.  It can be used in conjunction
          with GSSAPI encryption.
         </p></dd><dt><span class="term"><code class="literal">sspi</code></span></dt><dd><p>
