Document HotswapAgent core vs fatjar

[cdalexndr]

What's the difference between -XX:HotswapAgent=core and -XX:HotswapAgent=fatjar?

[skybber]

HotswapAgent core has no plugin except core JVM plugins. Then it is faster since less scanning tasks are necessary to be done, less class copying to target classloaders, there is no need to disable plugins. You choose only what you want. If you use ha-core, then plugins must be configured as maven dependecies in pom.xml

[cdalexndr]

Please add to https://github.com/TravaOpenJDK/trava-jdk-11-dcevm/blob/master/README.md

[skybber]

Done