Updates: Only use the filename component of URLs to form part of the temporary filename.

Previously we were passing the entire URL to `wp_tempnam()` (incorrectly) which caused the query string to be used as part of the temporary filename.
We now only use the file component of a url such as `https://example.com/filename.zip?arg1=1&arg2=2....&arg100=100` to prevent a long filename.

Fixes #34938

Built from https://develop.svn.wordpress.org/trunk@37598

Author: dd32

wp-admin/includes/file.php

@@ -493,7 +493,9 @@ function download_url( $url, $timeout = 300 ) {
 	if ( ! $url )
 		return new WP_Error('http_no_url', __('Invalid URL Provided.'));
 
-	$tmpfname = wp_tempnam($url);
+	$url_filename = basename( parse_url( $url, PHP_URL_PATH ) );
+
+	$tmpfname = wp_tempnam( $url_filename );
 	if ( ! $tmpfname )
 		return new WP_Error('http_no_file', __('Could not create Temporary file.'));
 

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.6-alpha-37597';
+$wp_version = '4.6-alpha-37598';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.