Fix GH-1935: CURLOPT_PASSWDFUNCTION and CURLOPT_MUTE no longer defined

Author: cmb69

reference/curl/constants.xml

@@ -487,7 +487,7 @@
    </term>
    <listitem>
     <simpara>
-     
+     Removed as of cURL 7.15.5; use <constant>CURLOPT_RETURNTRANSFER</constant> instead.
     </simpara>
    </listitem>
   </varlistentry>
@@ -1006,7 +1006,7 @@
    </term>
    <listitem>
     <simpara>
-     
+     Removed as of PHP 7.3.0.
     </simpara>
    </listitem>
   </varlistentry>

reference/curl/functions/curl-setopt.xml

@@ -2156,6 +2156,7 @@
           <row>
            <entry>Option</entry>
            <entry>Set <parameter>value</parameter> to</entry>
+           <entry>Notes</entry>
           </row>
          </thead>
          <tbody>
@@ -2177,6 +2178,7 @@
             string containing a password prompt, and the third is the maximum
             password length. Return the string containing the password.
            </entry>
+           <entry>Removed as of PHP 7.3.0.</entry>
           </row>
           <row>
            <entry valign="top"><constant>CURLOPT_PROGRESSFUNCTION</constant></entry>