CSS Aggregation breaks URLs with Query String

Problem/Motivation

Enabled CSS Aggregation breaks file urls with Query Strings (in my case generated by sass/compass). The url is encoded twice after running through CssOptimizer::rewriteFileURI.

This example shows the issue.

<?php
$url = 'sites/default/files/logo.png?123';
print file_create_url($url);
// Result: 'http://example.com/sites/default/files/logo.png%3F123'
// Expected: 'http://example.com/sites/default/files/logo.png?123'
?>

Proposed resolution

Preserve the query string to enable cache busting with other preprocess libs outside of Drupal.

Remaining tasks

User interface changes

API changes