Java challenge.
Given a String of unknown origin, convert it to a Path tail such that
1) other.resolve(tail) is guaranteed to be a file or dir below other (assume sym links are not an issue)
2) the conversion fails if (1) can not be met
3) worst case, assume other and tail may be for a different FileSystem
Main problem I see: "..\\a" has one element on a Linux filesystem, but resolving it onto a Windows Path other creates a Path outside of other.








