ticket:9101: canonical closure

git-svn-id: http://source.icu-project.org/repos/icu/icu@33982 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10274: Merge r33768 to r33981 from trunk.

git-svn-id: http://source.icu-project.org/repos/icu/icu@33983 251d0590-4201-4cf1-90de-194747b24ca1