Align filemode on RedHat to distro default
The RPM acutally ships the configuration and directory with0600/0700 while this module sets the mode to 0640/0750.
However, this has the drawback that on new nftables RPM versions,we are setting it back to the modules mode and triggering an nft...
Add Debian support
make path to `nft` binary configureable
Add support for Arch Linux
Arch Linux stores the configuration in a different path and does notprovide firewalld without explicit installation.
This basically the same as #66 – I've reused their code since it hasn'tbeen merged in a while.
