Inline documentation for hooks in wp-includes/template-loader.php.

Props jonlynch.
Fixes #25488.

Built from https://develop.svn.wordpress.org/trunk@25702


git-svn-id: http://core.svn.wordpress.org/trunk@25617 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Inline documentation for a hooks in wp-includes/template.php.

Props jonlynch for the initial patch.
Fixes #25487.
Built from https://develop.svn.wordpress.org/trunk@25703


git-svn-id: http://core.svn.wordpress.org/trunk@25618 1a063a9b-81f0-0310-95a4-ce76da25c4cd