Collation documentation fixes.

Discussion: https://postgr.es/m/9beecdf7-e8c8-4eab-adc7-fa225c2feefd@eisentraut.org

Author: jeff-davis

doc/src/sgml/catalogs.sgml

@@ -2384,9 +2384,9 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
        <structfield>collprovider</structfield> <type>char</type>
       </para>
       <para>
-       Provider of the collation: <literal>d</literal> = database
-       default, <literal>c</literal> = libc, <literal>i</literal> = icu
-      </para></entry>
+       Provider of the collation: <literal>d</literal> = database default,
+       <literal>b</literal> = builtin, <literal>c</literal> = libc,
+       <literal>i</literal> = icu </para></entry>
      </row>
 
      <row>
@@ -3028,9 +3028,8 @@ SCRAM-SHA-256$<replaceable>&lt;iteration count&gt;</replaceable>:<replaceable>&l
        <structfield>datlocprovider</structfield> <type>char</type>
       </para>
       <para>
-       Locale provider for this database: <literal>c</literal> = libc,
-       <literal>i</literal> = icu
-      </para></entry>
+       Locale provider for this database: <literal>b</literal> = builtin,
+       <literal>c</literal> = libc, <literal>i</literal> = icu </para></entry>
      </row>
 
      <row>

doc/src/sgml/charset.sgml

@@ -1320,7 +1320,9 @@ SELECT 'w;x*y-z' = 'wxyz' COLLATE num_ignore_punct; -- true
         </row>
         <row>
          <entry>level4</entry>
-         <entry>Punctuation</entry>
+         <entry>Punctuation<footnote><para>only with
+         <literal>ka-shifted</literal>; see <xref
+         linkend="icu-collation-settings-table"/></para></footnote></entry>
          <entry><literal>true</literal></entry>
          <entry><literal>true</literal></entry>
          <entry><literal>false</literal></entry>