Upgrade Tomcat to 8.5.3 (or 8.0.36)

Quoting announcement on announce@apache.org and other channels:

This is the first stable release of the 8.5.x branch. Tomcat 8.x users
should now use 8.5.x releases in preference to 8.0.x releases.

Apache Tomcat 8.5.x is intended to replace 8.0.x and includes new
features pulled forward from the 9.0.x branch. The notable changes since
8.5.2 include:

• Ensure error will not be thrown during deployment when scanning jar
  files with no or invalid MANIFEST.MF files.
• Improvements to memory leak detection and prevention
• The HTTP Server header is no longer set by default

Please refer to the change log for the complete list of changes:
http://tomcat.apache.org/tomcat-8.5-doc/changelog.html

Downloads:
http://tomcat.apache.org/download-80.cgi