[2.3.x] Initial changes for https://java.net/jira/browse/GRIZZLY-1570 (ServletRequest.getLocales() and BCP47 style Language tags.)
[2.3.x] + fix issue #1569
https://java.net/jira/browse/GRIZZLY-1569

"High priority findbugs warning produced with introduction of ConcurrentHashMapV8"
[2.3.x] + make ConcurrentHashMapV8 package private