FIX: when adding an IP to the spammer list, check the broader ban list

first

FEATURE: allow admins to search users using IP ranges

lib/ip_addr.rb

@@ -0,0 +1,16 @@
+class IPAddr
+
+  def to_cidr_s
+    if @addr
+      mask = @mask_addr.to_s(2).count('1')
+      if mask == 32
+        to_s
+      else
+        "#{to_s}/#{mask}"
+      end
+    else
+      nil
+    end
+  end
+
+end