In `page_attributes_meta_box()`, add an action, `'page_attributes_meta_box_template'` to allow callbacks to be performed and HTML to be inserted after the title of the Template section.

Props sgrant.	
Fixes #33625.

Built from https://develop.svn.wordpress.org/trunk@34340


git-svn-id: http://core.svn.wordpress.org/trunk@34304 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/meta-boxes.php

@@ -778,7 +778,17 @@ function page_attributes_meta_box($post) {
 	if ( 'page' == $post->post_type && 0 != count( get_page_templates( $post ) ) && get_option( 'page_for_posts' ) != $post->ID ) {
 		$template = !empty($post->page_template) ? $post->page_template : false;
 		?>
-<p><strong><?php _e('Template') ?></strong></p>
+<p><strong><?php _e('Template') ?></strong><?php
+	/**
+	 * Perform actions immediately after displaying the heading for the Template
+	 * section of the Page Attributes meta box.
+	 *
+	 * @since 4.4.0
+	 *
+	 * @param string $template The template used for the current post.
+	 */
+	do_action( 'page_attributes_meta_box_template', $template );
+?></p>
 <label class="screen-reader-text" for="page_template"><?php _e('Page Template') ?></label><select name="page_template" id="page_template">
 <?php
 /**

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34339';
+$wp_version = '4.4-alpha-34340';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.