I've confirmed 8.1beta4 passes regression tests on all hardware platforms

of RHEL 4.  Update supported-platforms list accordingly.

doc/src/sgml/installation.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/installation.sgml,v 1.243 2005/10/15 17:59:38 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/installation.sgml,v 1.244 2005/10/23 18:30:49 tgl Exp $ -->
 
 <chapter id="installation">
  <title><![%standalone-include[<productname>PostgreSQL</>]]>
@@ -1483,8 +1483,8 @@ kill `cat /usr/local/pgsql/data/postmaster.pid`
    community to work on the platforms listed below. A supported
    platform generally means that <productname>PostgreSQL</> builds and
    installs according to these instructions and that the regression
-   tests pass.  <quote>Build farm</quote> entries refer to builds
-   reported by the <ulink url="http://www.pgbuildfarm.org/">
+   tests pass.  <quote>Build farm</quote> entries refer to active test
+   machines in the <ulink url="http://www.pgbuildfarm.org/">
    PostgreSQL Build Farm</ulink>.
    Platform entries that show an older version of
    PostgreSQL are those that did not receive explicit testing at the
@@ -1791,51 +1791,51 @@ kill `cat /usr/local/pgsql/data/postmaster.pid`
        <row>
         <entry><systemitem class="osname">Red Hat Linux</></entry>
         <entry><systemitem>AMD64</></entry>
-        <entry>8.0.0</entry>
-        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2004-12-07</entry>
-        <entry>RHEL 3AS</entry>
+        <entry>8.1.0</entry>
+        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2005-10-23</entry>
+        <entry>RHEL 4</entry>
        </row>
        <row>
         <entry><systemitem class="osname">Red Hat Linux</></entry>
         <entry><systemitem>IA64</></entry>
-        <entry>8.0.0</entry>
-        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2004-12-07</entry>
-        <entry>RHEL 3AS</entry>
+        <entry>8.1.0</entry>
+        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2005-10-23</entry>
+        <entry>RHEL 4</entry>
        </row>
        <row>
         <entry><systemitem class="osname">Red Hat Linux</></entry>
         <entry><systemitem>PowerPC</></entry>
-        <entry>8.0.0</entry>
-        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2004-12-07</entry>
-        <entry>RHEL 3AS</entry>
+        <entry>8.1.0</entry>
+        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2005-10-23</entry>
+        <entry>RHEL 4</entry>
        </row>
        <row>
         <entry><systemitem class="osname">Red Hat Linux</></entry>
         <entry><systemitem>PowerPC 64</></entry>
-        <entry>8.0.0</entry>
-        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2004-12-07</entry>
-        <entry>RHEL 3AS</entry>
+        <entry>8.1.0</entry>
+        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2005-10-23</entry>
+        <entry>RHEL 4</entry>
        </row>
        <row>
         <entry><systemitem class="osname">Red Hat Linux</></entry>
         <entry><systemitem>S/390</></entry>
-        <entry>8.0.0</entry>
-        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2004-12-07</entry>
-        <entry>RHEL 3AS</entry>
+        <entry>8.1.0</entry>
+        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2005-10-23</entry>
+        <entry>RHEL 4</entry>
        </row>
        <row>
         <entry><systemitem class="osname">Red Hat Linux</></entry>
         <entry><systemitem>S/390x</></entry>
-        <entry>8.0.0</entry>
-        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2004-12-07</entry>
-        <entry>RHEL 3AS</entry>
+        <entry>8.1.0</entry>
+        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2005-10-23</entry>
+        <entry>RHEL 4</entry>
        </row>
        <row>
         <entry><systemitem class="osname">Red Hat Linux</></entry>
         <entry><systemitem>x86</></entry>
-        <entry>8.0.0</entry>
-        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2004-12-07</entry>
-        <entry>RHEL 3AS</entry>
+        <entry>8.1.0</entry>
+        <entry>Tom Lane (<email>tgl@sss.pgh.pa.us</email>), 2005-10-23</entry>
+        <entry>RHEL 4</entry>
        </row>
        <row>
         <entry><systemitem class="osname">Solaris</></entry>