tomcat-embed-core-9.0.31-CVE-2020-11996

Please see the PoC in testImplicitCloseLargeId unit test of TestHttp2Section51.java: https://github.com/rusakovichma/tomcat-embed-core-9.0.31-CVE-2020-11996/blob/master/test/org/apache/coyote/http2/TestHttp2Section51.java...