ticket:11373 Regex, check for integer overflow in maxMatchLength computation.

git-svn-id: http://source.icu-project.org/repos/icu/icu@36794 251d0590-4201-4cf1-90de-194747b24ca1
ticket:11308: Remove branch.

git-svn-id: http://source.icu-project.org/repos/icu/icu@36795 251d0590-4201-4cf1-90de-194747b24ca1
ticket:11308: Remove branch.

git-svn-id: http://source.icu-project.org/repos/icu/icu@36796 251d0590-4201-4cf1-90de-194747b24ca1
ticket:11402: Create branch.

git-svn-id: http://source.icu-project.org/repos/icu/icu@36797 251d0590-4201-4cf1-90de-194747b24ca1
ticket:11371 Improved checking of regular expression pattern size limits.

git-svn-id: http://source.icu-project.org/repos/icu/icu@36801 251d0590-4201-4cf1-90de-194747b24ca1