Changes

Update version to 2.1.0

(c) year updates

Fix ConcurrentModificationException when using maven-bundle-plugin

Fix #207 Expose the platform default configurator directly

Make ServerEndpointConfig.Configurator.getContainerDefaultConfigurator()
public.

Fix #190 and #192. Clarify messages and MessageHandler add/remove

To quote gregw "Once you start a websocket message, you continue to use
the same MessageHandler for the entire message."

Fix #228 - clarify Session.getRequestURI()

Fix #235 - passing user properties

Fix Javadoc references that broke CI builds

Fix issue-211 - Add method for use by front controller

Relax restriction on timing of deployment. Clarify language.

Version updates 2.0 -> 2.1

Fix copyright dates for files changed in 2021

Fix copyright dates for files changed in 2020

Add changes so far for WebSocket 2.1 to the changes section

Fix #382 - clarify session idle timeout

Further clarification of zero or negative timeout values

Add currently undocumented changes

Refactor the packaging for JPMS and add module-info

The server jar no longer contains a copy of the client classes. The copy
has been replaced by a dependency.

Fix typo

Fix typo

Add @since information to Javadoc

Fix #210 - Add an API for client-side TLS configuration

Fix copyright dates

Allow for new files with standard Eclipse copyright header

WebSocket 2.1 release review actions. Fix copyright year for Javadoc.

Make client jar OSGi symbolic name header unique

Signed-off-by: jansupol <jan.supol@oracle.com>

Follow-up to #393. Move server JAR properties to server POM

Better to specify server JAR specific properties in the server POM
rather than in the parent POM.