Fix build with wai 0.3.0.

This version of wai changed the type of Middleware, so I cannot seem
to liftIO inside it. So, got rid of a lot of not really needed
complexity to use System.Log.Logger's logging stuff, and just use
the standard wai stdout logger when debug logging is enabled.

Format may change some, and it logs http to stdout instead of stderr
now. Doesn't matter for the webapp since both go to the same log anyway.

Utility/WebApp.hs

@@ -18,16 +18,12 @@ import qualified Yesod
 import qualified Network.Wai as Wai
 import Network.Wai.Handler.Warp
 import Network.Wai.Handler.WarpTLS
-import Network.Wai.Logger
-import Control.Monad.IO.Class
 import Network.HTTP.Types
-import System.Log.Logger
 import qualified Data.CaseInsensitive as CI
 import Network.Socket
 import "crypto-api" Crypto.Random
 import qualified Web.ClientSession as CS
 import qualified Data.ByteString.Lazy as L
-import qualified Data.ByteString.Lazy.UTF8 as L8
 import qualified Data.ByteString as B
 import qualified Data.Text as T
 import qualified Data.Text.Encoding as TE
@@ -158,35 +154,6 @@ getSocket h = do
 		listen sock maxListenQueue
 		return sock
 
-{- Checks if debugging is actually enabled. -}
-debugEnabled :: IO Bool
-debugEnabled = do
-	l <- getRootLogger
-	return $ getLevel l <= Just DEBUG
-
-{- WAI middleware that logs using System.Log.Logger at debug level.
- -
- - Recommend only inserting this middleware when debugging is actually
- - enabled, as it's not optimised at all.
- -}
-httpDebugLogger :: Wai.Middleware
-httpDebugLogger waiApp req = do
-	logRequest req
-	waiApp req
-
-logRequest :: MonadIO m => Wai.Request -> m ()
-logRequest req = do
-	liftIO $ debugM "WebApp" $ unwords
-		[ showSockAddr $ Wai.remoteHost req
-		, frombs $ Wai.requestMethod req
-		, frombs $ Wai.rawPathInfo req
-		--, show $ Wai.httpVersion req
-		--, frombs $ lookupRequestField "referer" req
-		, frombs $ lookupRequestField "user-agent" req
-		]
-  where
-	frombs v = L8.toString $ L.fromChunks [v]
-
 lookupRequestField :: CI.CI B.ByteString -> Wai.Request -> B.ByteString
 lookupRequestField k req = fromMaybe "" . lookup k $ Wai.requestHeaders req