ticket:9101: parse rule chains

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/markus@33515 251d0590-4201-4cf1-90de-194747b24ca1
ticket:9101: parse special reset positions and simple settings

git-svn-id: http://source.icu-project.org/repos/icu/icu/branches/markus@33517 251d0590-4201-4cf1-90de-194747b24ca1