Updating docs (Mc)

ext/dbx/howto_extend_dbx.html

@@ -50,7 +50,7 @@ a               { color: #000088; }
 How-to code support for another database<br>
 </div>
 <div class="text">
-Every supported database module must be loaded by PHP before it can be used. Every supported database module must be added to the dbx-module before it can be used. Currently there is support for MySQL, PostgreSQL, Microsoft SQL Server and ODBC, but it is not difficult to add support for more databases.<br>
+Every supported database module must be loaded by PHP before it can be used. Every supported database module must be added to the dbx-module before it can be used. Currently there is support for MySQL, PostgreSQL, Microsoft SQL Server, Frontbase, Sybase-CT and ODBC, but it is not difficult to add support for more databases.<br>
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 The dbx module is found in de PHP ext/dbx folder. The support-code is found in the same folder <br>
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