Currently --track-fds=yes or --track-fds=all report both bad usage and never closed file descriptors. Sometimes users are only interested in bad file descriptor usage errors, but don't care about never close file descriptors. Instead of making them create suppressions for the never closed file descriptors we could have an --track-fds=bad mod that only reports errors on bad usage.

This might also make an interesting mode that we might want to enable by default.