jdk17+ suppressWarnings, FJ updates

Incorporate snippets code improvements from Pavel Rappo

restore historic comment and parens

8232230: Suppress warnings on non-serializable non-transient instance fields in java.util.concurrent

update to using jdk11 by default, except link to jdk10 javadocs;
sync @docRoot references in javadoc with upstream

coding style

tidying

coding style

optimized implementation of forEach

prefer throwing ExceptionInInitializerError from <clinit> to throwing Error

8177789: fix collections framework links to point to java.util package doc

whitespace

convert to Objects.requireNonNull

remove confusing comments

use idiom: lastRet = cursor++

add reference to Floyd 1964

Replace stale reference to ArraySnapshotSpliterator

s~\bsun\.(misc\.Unsafe)\b~jdk.internal.$1~g;
s~\bputOrdered([A-Za-z]+)\b~put${1}Release~g

Terminate javadoc with a period.

toArray methods should be colocated in source file

standardize Unsafe mechanics; slightly smaller bytecode

remove unused/redundant imports

this collection => this XXX

add javadoc for spliterator()

Mesh with PriorityQueue update

javadoc warning fixes: add serialization method @throws

port to latest lambda

Synch with lambda Spliterator API

Spliterator sync

remove bad @param

fix javac [rawtypes] warnings

lambda-lib support

fix imports

blanket unchecked warning suppression for comparator-using classes

make removeEQ package-private to inhibit bridge method

coding style

make drainTo methods more robust when c.add throws

small improvements

fix javac 7 [rawtypes] warnings

Reduce dependencies in static initialization

simplify size()

Ensure consistent state on exceptions; incorporate review suggestions

sync javadoc of enqueue methods

minor javadoc changes

Avoid zero capacity argument in serialize

use blessed declaration modifier order

Fix javadoc code samples to use <pre>  {@code so that we can replace &lt; with <, etc.

Sync with OpenJDK; untabify

6394004: (coll) Thread-safety and Performance improvements to PriorityQueue

whitespace

doc fixes

doc fixes

Avoid generics warnings; clarify javadocs

doc fixes

E o -> E e

CopyOnWriteArraySet and ConcurrentHashMap no longer implement Cloneable
Improve javadoc wording in other classes

Don't use raw type for Comparable

javadoc lint; Thread.interrupt shouldn't throw exception if thread dead

Adapt to AbstractQueuedSynchronizer

fixed typos; avoided some casts

Added docs for type params

added drainTo; clarified various exception specs

Fix some javadoc inconsistencies

Adapt AbstractQueue changes; Conditionalize CancellableTask.reset; new TimeUnit methods

Kill ScheduledExecutor Date methods; Documentation clarifications

Fixes to minor errors found by DocCheck

Final major updates to Collection related classes.

Regressed to the unbounded form

PBQ shouldn't implement Sorted

Significant doc updates:
 - inherit comments where appropriate
 - ensure runtime exception comments inherited (overriding as needed)
 - consistent descriptions
 - introduce head and tail terminology

Locks in subpackage; fairness params added

Added missing javadoc tags; minor reformatting

Minor doc updates; FairReentrantLock serialize now

re-check-in initial implementations