fix edge case, if maxretry is 1, let them get 1 request in

lib/rack/attack/allow2ban.rb

@@ -13,10 +13,9 @@ module Rack
           count = cache.count("#{key_prefix}:count:#{discriminator}", findtime)
           if count >= maxretry
             ban!(discriminator, bantime)
-            true
-          else
-            false
           end
+          # we may not block them this time, but they're banned for next time
+          false
         end
       end
     end

spec/allow2ban_spec.rb

@@ -45,8 +45,8 @@ describe 'Rack::Attack.Allow2Ban' do
           get '/?foo=OMGHAX', {}, 'REMOTE_ADDR' => '1.2.3.4'
         end
 
-        it 'fails' do
-          last_response.status.must_equal 401
+        it 'succeeds' do
+          last_response.status.must_equal 200
         end
 
         it 'increases fail count' do