update to using jdk11 by default, except link to jdk10 javadocs; sync @docRoot references in javadoc with upstream
8177789: fix collections framework links to point to java.util package doc
this collection => this XXX
Update Creative Commons license URL in legal notices
sync with jsr166 package
sync with jsr166 package
sync with jsr166y package
branch jsr166y into java.util.concurrent
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