Cryptographically scramble IPs stored by Neocities

"There is a time when the operation of the machine becomes so odious,
makes you so sick at heart, that you can't take part; you can't even
passively take part, and you've got to put your bodies upon the gears
and upon the wheels, upon the levers, upon all the apparatus, and you've
got to make it stop. And you've got to indicate to the people who run
it, to the people who own it, that unless you're free, the machine will
be prevented from working at all."

Mario Savio
Sproul Hall Steps
University of California, Berkeley
December 3, 1964

environment.rb

@@ -26,6 +26,8 @@ else
 end
 # :nocov:
 
+raise 'hash_ip_salt is required' unless $config['ip_hash_salt']
+
 DB = Sequel.connect $config['database'], sslmode: 'disable', max_connections: $config['database_pool']
 DB.extension :pagination