jsr166 integration 2020-05

8243614: Typo in ReentrantLock's Javadoc
  webrev
8234131: Miscellaneous changes imported from jsr166 CVS 2020-05
  webrev

Consolidated hg status
Consolidated hg diffstat
Consolidated hg diff -wbB (ignoring whitespace changes)
Consolidated hg diff
Mercurial Queues patches directory