There is nothing on the website about "safe-civilians" (false|true)

What does it do?

Civilians would be players who are not in a clan?

makes it so clan players cant attack civilians

correct, someone asked for this feature for their server so i added it. They wanted clan players not to be able to kill builders, etc.

That is an excellent idea. Definitely going to enable this because those who don't want to join a clan, obviously aren't interested in pvp. Thank you.!

question, does civilians can attack clan members ?

Don't remember, try it out. But its not something I recommend using. Your players will just leave their clan whenever they come into trouble to turn on their god mode basically. It will throw everything out of whack.