Abandon local copy of HashMap.java - more trouble than it's worth
8210280: Unnecessary reallocation when invoking HashMap.putAll()
Add portability layer for new location of SharedSecrets in JDK-8211122
update to using jdk11 by default, except link to jdk10 javadocs; sync @docRoot references in javadoc with upstream
8205399: Set node color on pinned HashMap.TreeNode deletion
merge: simplify code as suggested by Zheka Kozlov
8203279: Faster rounding up to nearest power of two
sync Oracle copyright years
sync 8174109: Better queuing priorities
fix javadoc warnings for serialization methods
8186171: HashMap: Entry.setValue may not work after Iterator.remove() called for previous entries
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