Closes#1574
Add tests for long paths
Make sure long path is >260
Add rar test file with invalid Windows filenames
Add rar_unpack tests for unicode and passworded sets
Simplify Unrar command building
Add test for rar_invalid_windows
Remove check for 260 chars in rar_unpack
Should never happen anymore
Let Unrar rename invalid filenames
Check full path output if rar_unpack
Add helper for check
Correct test_rar_unpack_invalid_windows_filenames
Apply changes also to Direct Unpacker
Extend testing to make sure full paths are tested
Add tests for long paths inside rar
Unrar auto-rename message is different on Linux
