Update documentation to include new syntax for Auto-Clear Custom URL …

…List; See: wpsharks/comet-cache#191

src/includes/classes/MenuPageOptions.php

@@ -398,7 +398,7 @@ public function __construct()
 
         if (IS_PRO || $this->plugin->isProPreview()) {
             echo '<h4 style="margin-bottom:0;">'.__('Auto-Clear a List of Custom URLs Too?', SLUG_TD).'</h4>'."\n";
-            echo '<p style="margin-top:2px;">'.sprintf(__('When you update a Post/Page, approve a Comment, or make other changes where %1$s can detect that a Post/Page cache should be cleared to keep your site up-to-date; then %1$s will also clear a list of custom URLs that you list here. <strong>Please list one URL per line.</strong>', SLUG_TD), esc_html(NAME)).'</p>'."\n";
+            echo '<p style="margin-top:2px;">'.sprintf(__('When you update a Post/Page, approve a Comment, or make other changes where %1$s can detect that a Post/Page cache should be cleared to keep your site up-to-date; then %1$s will also clear a list of custom URLs that you list here. <strong>Please list one URL per line.</strong> A wildcard <code>*</code> character can also be used when necessary; e.g., <code>/category/abc-followed-by-*</code> (where <code>*</code> = 0 or more characters that are NOT a slash <code>/</code>). Other special characters include: <code>**</code> = 0 or more characters of any kind, including <code>/</code> slashes; <code>^</code> = beginning of the string; <code>$</code> = end of the string. To learn more about this syntax, please see <a href ="http://zencache.com/r/watered-down-regex-syntax/" target="_blank">this KB article</a>.', SLUG_TD), esc_html(NAME)).'</p>'."\n";
             echo '<p><textarea name="'.esc_attr(GLOBAL_NS).'[saveOptions][cache_clear_urls]" spellcheck="false" wrap="off" rows="5">'.format_to_edit($this->plugin->options['cache_clear_urls']).'</textarea></p>'."\n";
         }
         echo '   </div>'."\n";