ticket:10458: Merge r34504 to r34576 from trunk.

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/tkeep@34577 251d0590-4201-4cf1-90de-194747b24ca1
ticket:10461: Merge from trunk.

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/tkeep@34580 251d0590-4201-4cf1-90de-194747b24ca1