Add support for Tomcat 9 #9531
Description
Tomcat 9 is required to run on Java 9. This is mostly transparent except for the accept-count property. In Tomcat 8, it is called setBacklog on AbstractProtocol. On Tomcat 9, it's called setAcceptCount on the same class.
Because we want to be able to run the build with Java9, we'll have to go the reflective route for both use cases so that we can build with both Tomcat 8 and Tomcat 9.