Update some docs and the changelogs

doc/tutorial/Authentication.lhs

@@ -44,7 +44,7 @@ You can use this combinator to protect an API as follows:
 
 module Authentication where
 
-import Control.Monad.Trans.Except       (ExceptT, throwE)
+import Control.Monad.Trans.Except       (ExceptT)
 import Data.Aeson                       (ToJSON)
 import Data.ByteString                  (ByteString)
 import Data.Map                         (Map, fromList)
@@ -59,6 +59,7 @@ import Servant.API                      ((:<|>) ((:<|>)), (:>), BasicAuth,
                                           Get, JSON)
 import Servant.API.BasicAuth            (BasicAuthData (BasicAuthData))
 import Servant.API.Experimental.Auth    (AuthProtect)
+import Servant                          (throwError)
 import Servant.Server                   (BasicAuthCheck (BasicAuthCheck),
                                          BasicAuthResult( Authorized
                                                         , Unauthorized
@@ -274,7 +275,7 @@ database = fromList [ ("key1", Account "Anne Briggs")
 -- This is our bespoke (and bad) authentication logic.
 lookupAccount :: ByteString -> ExceptT ServantErr IO Account
 lookupAccount key = case Map.lookup key database of
-  Nothing -> throwE (err403 { errBody = "Invalid Cookie" })
+  Nothing -> throwError (err403 { errBody = "Invalid Cookie" })
   Just usr -> return usr
 ```
 
@@ -289,7 +290,7 @@ method:
 authHandler :: AuthHandler Request Account
 authHandler =
   let handler req = case lookup "servant-auth-cookie" (requestHeaders req) of
-        Nothing -> throwE (err401 { errBody = "Missing auth header" })
+        Nothing -> throwError (err401 { errBody = "Missing auth header" })
         Just authCookieKey -> lookupAccount authCookieKey
   in mkAuthHandler handler
 ```

servant-docs/CHANGELOG.md

@@ -1,3 +1,8 @@
+HEAD
+----
+
+* Export `throwError` from module `Servant`
+
 0.5
 ----
 

servant-server/CHANGELOG.md

@@ -1,3 +1,8 @@
+HEAD
+----
+
+* Export `throwError` from module `Servant`
+
 0.6
 ---
 

servant/CHANGELOG.md

@@ -1,3 +1,8 @@
+HEAD
+----
+
+* Export `throwError` from module `Servant`
+
 0.5
 ----