ticket:11049 regular expressions, use same logic in UText and (UChar *) code paths when checking limit of potential match start positions.

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@36161 251d0590-4201-4cf1-90de-194747b24ca1
ticket:11042: Han radical-stroke order data in the root collator instead of CJK tailorings, adjusted code & tests (merged from branches/markus/rootunihan)

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@36162 251d0590-4201-4cf1-90de-194747b24ca1
ticket:11051 Add synchronization to u_getDataDirectory().

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@36165 251d0590-4201-4cf1-90de-194747b24ca1
ticket:11010: improve ucol_mergeSortkeys() API doc

git-svn-id: http://source.icu-project.org/repos/icu/icu/trunk@36166 251d0590-4201-4cf1-90de-194747b24ca1