Entries: document onclick for select elements

When answering a question on StackOverflow about a broken `select` element, the OP had this option set to `false`.  The `select` element was only being validated on focusout and on submit.  Selecting items had no effect on validation message of this element.   Removing this option, since it cannot be set to `true`, fixed the issue.  Therefore, the documentation is incomplete.  This option affects validation of `select` elements as well as radio and checkbox.

https://jsfiddle.net/pu752c3a/

Author: sparky672

entries/validate.xml

@@ -272,10 +272,10 @@
 			</property>
 			<property name="onclick">
 				<desc>
-					Validate checkboxes and radio buttons on click. Set to false to disable.
+					Validate checkboxes, radio buttons, and select elements on click. Set to false to disable.
 					<p>Set to a Function to decide for yourself when to run validation.</p>
 					<p>A boolean true is not a valid value.</p>
-					<p><strong>Example</strong>: Disables onclick validation of checkboxes and radio buttons.</p>
+					<p><strong>Example</strong>: Disables onclick validation of checkboxes, radio buttons, and select elements.</p>
 					<pre><code>
 					$("#myform").validate({
 						onclick: false