Disable WEBrick logging in HTTPUNIXServer to reduce spec output noise

spec/support/http_unix_server.rb

@@ -2,6 +2,12 @@ require 'webrick'
 
 # like WEBrick::HTTPServer, but listens on UNIX socket
 class HTTPUNIXServer < WEBrick::HTTPServer
+  def initialize(config = {})
+    null_log = WEBrick::Log.new(IO::NULL, 7)
+
+    super(config.merge(Logger: null_log, AccessLog: null_log))
+  end
+
   def listen(address, port)
     socket = Socket.unix_server_socket(address)
     socket.autoclose = false