Update unix_interfaces with CStr compatibility
Update unix_interfaces with CStr compatibility

Ran into some issues cross-compiling on architectures where `c_char` is conditionally defined as `u8` rather than `i8`, causing `CStr::from_ptr` to reject the hard `u8` cast. Updated the cast to `c_char` directly
libpnet/libpnet,mrmonday/libpnet,fsck/libpnet,symphorien/libpnet,fsck/libpnet,symphorien/libpnet,mrmonday/libpnet,symphorien/libpnet,symphorien/libpnet,libpnet/libpnet,mrmonday/libpnet,libpnet/libpnet,fsck/libpnet,libpnet/libpnet,mrmonday/libpnet,fsck/libpnet