Automatically esc_url() the URL echoed by the_permalink().

This makes the_permalink() useful, rather than needing to do `echo esc_url( get_permalink() )` to get proper encoding of ampersands, etc. This will not double-encode when esc_url() has already been applied to the filter here, but that code can now be removed.

props mfields.
fixes #17562.



git-svn-id: http://core.svn.wordpress.org/trunk@23527 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/link-template.php

@@ -13,7 +13,7 @@
  * @uses apply_filters() Calls 'the_permalink' filter on the permalink string.
  */
 function the_permalink() {
-	echo apply_filters('the_permalink', get_permalink());
+	echo esc_url( apply_filters( 'the_permalink', get_permalink() ) );
 }
 
 /**