Add missing doc blocks to wp-admin/includes/*.

Fix some egregious uses of tabbing.
Some functions can simply return `apply_filters(...)` instead of setting a variable that is immediately returned.

See #32444.

Built from https://develop.svn.wordpress.org/trunk@32654


git-svn-id: http://core.svn.wordpress.org/trunk@32624 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/class-wp-filesystem-ftpext.php

@@ -17,7 +17,11 @@
 class WP_Filesystem_FTPext extends WP_Filesystem_Base {
 	public $link;
 
-	public function __construct($opt='') {
+	/**
+	 *
+	 * @param array $opt
+	 */
+	public function __construct( $opt = '' ) {
 		$this->method = 'ftpext';
 		$this->errors = new WP_Error();
 
@@ -58,6 +62,10 @@ class WP_Filesystem_FTPext extends WP_Filesystem_Base {
 			$this->options['ssl'] = true;
 	}
 
+	/**
+	 *
+	 * @return bool
+	 */
 	public function connect() {
 		if ( isset($this->options['ssl']) && $this->options['ssl'] && function_exists('ftp_ssl_connect') )
 			$this->link = @ftp_ssl_connect($this->options['hostname'], $this->options['port'], FS_CONNECT_TIMEOUT);