Docs: Update the hook doc summary for the `wp_http_ixr_client_headers` filter, introduced in [34164].

The idea is to try to reflect what the filterable value is rather than why it's filterable.

Fixes #24598.

Built from https://develop.svn.wordpress.org/trunk@34203


git-svn-id: http://core.svn.wordpress.org/trunk@34167 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/class-wp-http-ixr-client.php

@@ -69,11 +69,11 @@ class WP_HTTP_IXR_Client extends IXR_Client {
 		}
 
 		/**
-		 * Filter to allow custom headers to be sent
+		 * Filter the headers collection to be sent to the XML-RPC server.
 		 *
 		 * @since 4.4.0
 		 *
-		 * @param array $headers Header collection to be sent to the XML-RPC server.
+		 * @param array $headers Array of headers to be sent.
 		 */
 		$args['headers'] = apply_filters( 'wp_http_ixr_client_headers', $args['headers'] );
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.4-alpha-34202';
+$wp_version = '4.4-alpha-34203';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.