- update to 0.16.9:
* fix long filename truncation on windows
* distinguish file open mode when checking files and downloading/seeding with bittorrent.
updates storage interface
* improve file_storage::map_file when dealing with invalid input
* improve handling of invalid utf-8 sequences in strings in torrent files
* handle more cases of broken .torrent files
* fix bug filename collision resolver
* fix bug in filename utf-8 verification
* make need_save_resume() a bit more robust
* fixed sparse flag manipulation on windows
* fixed streaming piece picking issue
- do not hide symbols (drop -fvisibility=hidden) to fix qbittorrent