RTL support via the RTL Servlet causes proxy servlet and web proxy capabilities to not handle proxied CSS files properly

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.0 DXP SP2
• Fix Version/s: 7.0.0 DXP FP21, 7.0.0 DXP SP4, 7.0.X EE, Master
• Component/s: RTL Infrastructure, Search Infrastructure
• Labels:
  • EXP7
  • liferay-digital-enterprise-70-sp4
  • liferay-fixpack-de-21-7010
• Branch Version/s:
  7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 4
• Git Pull Request: https://github.com/brianchandotcom/liferay-portal/pull/49590
• Bug Type: Regression Bug

Steps to reproduce:

1. Start remote Elasticsearch
2. Start Kibana
3. Start portal
4. Add Marvel portlet to page

Expected Result: Portlet loads correctly.

Actual Result: CSS errors.

Reproduced on:
Tomcat 8.0.32 + MySQL 5.7.17
Portal ee-7.0.x Git Hash: faf51d6567340a28cee92d3b493ad2530447b04b