Missed Guru's comment before integrating. These need to have the copyright year updated to 2021:

agent/src/main/java/org/openjdk/jmc/agent/Agent.java
agent/src/main/java/org/openjdk/jmc/agent/jfr/JFRTransformDescriptor.java
agent/src/main/java/org/openjdk/jmc/agent/jfr/impl/JFREventClassGenerator.java
agent/src/main/java/org/openjdk/jmc/agent/jfr/impl/JFRMethodAdvisor.java
agent/src/main/java/org/openjdk/jmc/agent/jfrlegacy/impl/JFRLegacyMethodAdvisor.java
agent/src/main/java/org/openjdk/jmc/agent/util/TypeUtils.java
agent/src/test/java/org/openjdk/jmc/agent/converters/test/InstrumentMeConverter.java
agent/src/test/java/org/openjdk/jmc/agent/converters/test/ObjectConverterClass.java
agent/src/test/resources/org/openjdk/jmc/agent/converters/test/jfrprobes_template.xml