Address review comments

Add a note on which functions use the expired password constants.
Remove MYSQLI_SET_CHARSET_DIR, MYSQLI_SERVER_QUERY_NO_GOOD_INDEX_USED, MYSQLI_SERVER_QUERY_NO_INDEX_USED, MYSQLI_SERVER_QUERY_WAS_SLOW, MYSQLI_SERVER_PS_OUT_PARAMS, MYSQLI_DATA_TRUNCATED and MYSQLI_NO_DATA.

reference/mysqli/constants.xml

@@ -36,6 +36,7 @@
      <simpara>
       Indicates to the server that the client can handle sandbox mode
       for expired passwords.
+      Can be used with <function>mysqli_options</function>.
      </simpara>
     </listitem>
    </varlistentry>
@@ -150,6 +151,7 @@
      <simpara>
       Indicates to the server that the client can handle sandbox mode
       for expired passwords.
+      Can be used with <function>mysqli_real_connect</function>.
      </simpara>
     </listitem>
    </varlistentry>
@@ -261,7 +263,9 @@
     </term>
     <listitem>
      <simpara>
-      Copy results from the internal <literal>mysqlnd</literal> buffer
+      As of PHP 8.1, this constants no longer has any effect.
+      Before PHP 8.1, this constant is used to copy results
+      from the internal <literal>mysqlnd</literal> buffer
       into the PHP variables fetched.
       By default, <literal>mysqlnd</literal> will use a reference logic
       to avoid copying and duplicating results held in memory.
@@ -804,28 +808,6 @@
      </para>
     </listitem>
    </varlistentry>
-   <varlistentry xml:id="constant.mysqli-no-data">
-    <term>
-     <constant>MYSQLI_NO_DATA</constant>
-     (<type>int</type>)
-    </term>
-    <listitem>
-     <para>
-      No more data available for bind variable
-     </para>
-    </listitem>
-   </varlistentry>
-   <varlistentry xml:id="constant.mysqli-data-truncated">
-    <term>
-     <constant>MYSQLI_DATA_TRUNCATED</constant>
-     (<type>int</type>)
-    </term>
-    <listitem>
-     <para>
-      Data truncation occurred. Available since MySQL 5.0.5.
-     </para>
-    </listitem>
-   </varlistentry>
    <varlistentry xml:id="constant.mysqli-enum-flag">
     <term>
      <constant>MYSQLI_ENUM_FLAG</constant>
@@ -928,17 +910,6 @@
      </para>
     </listitem>
    </varlistentry>
-   <varlistentry xml:id="constant.mysqli-set-charset-dir">
-    <term>
-     <constant>MYSQLI_SET_CHARSET_DIR</constant>
-     (<type>int</type>)
-    </term>
-    <listitem>
-     <simpara>
-      The path name to the directory that contains character set definition files.
-     </simpara>
-    </listitem>
-   </varlistentry>
    <varlistentry xml:id="constant.mysqli-report-index">
     <term>
      <constant>MYSQLI_REPORT_INDEX</constant>
@@ -1005,26 +976,6 @@
      </para>
     </listitem>
    </varlistentry>
-   <varlistentry xml:id="constant.mysqli-server-query-no-good-index-used">
-    <term>
-     <constant>MYSQLI_SERVER_QUERY_NO_GOOD_INDEX_USED</constant>
-     (<type>int</type>)
-    </term>
-    <listitem>
-     <para>
-     </para>
-    </listitem>
-   </varlistentry>
-   <varlistentry xml:id="constant.mysqli-server-query-no-index-used">
-    <term>
-     <constant>MYSQLI_SERVER_QUERY_NO_INDEX_USED</constant>
-     (<type>int</type>)
-    </term>
-    <listitem>
-     <para>
-     </para>
-    </listitem>
-   </varlistentry>
    <varlistentry xml:id="constant.mysqli-server-public-key">
     <term>
      <constant>MYSQLI_SERVER_PUBLIC_KEY</constant>
@@ -1035,29 +986,6 @@
      </para>
     </listitem>
    </varlistentry>
-   <varlistentry xml:id="constant.mysqli-server-ps-out_params">
-    <term>
-     <constant>MYSQLI_SERVER_PS_OUT_PARAMS</constant>
-     (<type>int</type>)
-    </term>
-    <listitem>
-     <simpara>
-      Mark resultset containing output parameter values.
-     </simpara>
-    </listitem>
-   </varlistentry>
-   <varlistentry xml:id="constant.mysqli-server-query-was_slow">
-    <term>
-     <constant>MYSQLI_SERVER_QUERY_WAS_SLOW</constant>
-     (<type>int</type>)
-    </term>
-    <listitem>
-     <simpara>
-     Last statement took more than the time value specified
-     in server variable <literal>long_query_time</literal>.
-     </simpara>
-    </listitem>
-   </varlistentry>
    <varlistentry xml:id="constant.mysqli-refresh-grant">
     <term>
      <constant>MYSQLI_REFRESH_GRANT</constant>