Update mysql.html (#19)

Added MySQL functions

Author: tigertigerboy07

dbmsIdentification/mysql.html

@@ -21,6 +21,12 @@ <h3 id="sql-injection-detection">DBMS Identification</h3>
       <td>String concatenation</td>
       <td>page.php?id=' 'mysql' -- </td>
     </tr>
+    <tr>
+      <td>Functions</td>
+      <td>connection_id() -- <br>
+      row_count() --  <br>
+      POW(1,1) -- </td>
+    </tr>
     <tr>
       <td>Error messages<br/><i>Note: Triggering DB errors through invalid syntax will sometimes return verbose error messages that include the DBMS name.</i></td>
       <td>page.php?id='</td>