8188122: Path length limits on Windows leads to obscure class loading failures Summary: Used the unicode version of windows API's to handled long paths and avoid using the stat() function. Reviewed-by: stuefe, iklam

8191042: Deprecate VM option CheckEndorsedAndExtDirs Reviewed-by: dholmes

8190817: deopt special-case for _return_register_finalizer is confusing and leads to bugs Reviewed-by: vlivanov, dpochepk