Make an editorial pass over the 9.0 release notes.

This is mostly about grammar, style, and presentation, though I did find
a few small factual errors.

doc/src/sgml/config.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.306 2010/08/22 02:37:32 momjian Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/config.sgml,v 1.307 2010/08/23 02:43:25 tgl Exp $ -->
 
 <chapter Id="runtime-config">
   <title>Server Configuration</title>
@@ -3507,7 +3507,7 @@ local0.*    /var/log/postgresql
             </row>
             <row>
              <entry><literal>%e</literal></entry>
-             <entry>SQL state</entry>
+             <entry>SQLSTATE error code</entry>
              <entry>no</entry>
             </row>
             <row>
@@ -3578,7 +3578,7 @@ FROM pg_stat_activity;
         <para>
          <application>Syslog</> produces its own 
          time stamp and process ID information, so you probably do not want to
-         use those escapes if you are logging to <application>syslog</>.
+         include those escapes if you are logging to <application>syslog</>.
         </para>
        </tip>
       </listitem>
@@ -3705,7 +3705,7 @@ FROM pg_stat_activity;
         virtual transaction ID,
         regular transaction ID,
         error severity,
-        SQL state code,
+        SQLSTATE code,
         error message,
         error message detail,
         hint,

doc/src/sgml/ddl.sgml

-<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.95 2010/08/20 13:59:45 tgl Exp $ -->
+<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.96 2010/08/23 02:43:25 tgl Exp $ -->
 
 <chapter id="ddl">
  <title>Data Definition</title>
@@ -846,7 +846,7 @@ CREATE TABLE order_items (
    </para>
   </sect2>
 
-  <sect2>
+  <sect2 id="ddl-constraints-exclusion">
    <title>Exclusion constraints</title>
 
    <indexterm>