New features

swapfc_remove_free_swap_perc Allows defining at what % of available ram we remove a swap file (defaluts to 55 which is the old value of swapfc_free_swap_perc + 40.
swapfc_min_count Just how you can define the maximum number of swap files created by swapfc, you can now define a minimum that will always be allocated (for instanse to restore the old behaviour of creating a swap file on startup set this to 1). Defaults to 0.
swapfc_priority Sets the priority of swap files created by swapfc (decreasing by one for every swap file created). Defaults to -2 (old default).

Please read through them and send in grammar mistakes and anything you would like to be added 🥳 .

Misc

Further removal of use of external programs thus improving performance (thanks zenofile).
Additional systemd hardening.
Run as type=notify which should improve the output of systemctl status systemd-swap.
Run systemd-swap at "realtime" priority (1ac16cb if you're interested).
Code refactoring and cleanup.
Log when we start creating swap files and warn if combining zram with zswap/swapfc/swapd.
Never shred the swap file before using it (previously it would shred if the filesystem was not ext* or btrfs) (3f2e5a9 & 41d86af).