web: add Peter Simons' patch fixing Data.Conduit.Network HostIPv4 error (#171)

(cherry picked from commit 993cae3a74eaa42b720fe51744e5459fd5a4eaa9)

Conflicts:
	hledger-web/Hledger/Web/Main.hs

hledger-web/Hledger/Web/Main.hs

@@ -15,7 +15,8 @@ import Yesod.Default.Config --(fromArgs)
 -- import Yesod.Default.Main   (defaultMain)
 import Settings            --  (parseExtra)
 import Application          (makeApplication)
-import Data.Conduit.Network (HostPreference(HostIPv4))
+import Data.String
+import Data.Conduit.Network
 import Network.Wai.Handler.Warp (runSettings, defaultSettings, settingsPort)
 import Network.Wai.Handler.Launch (runUrlPort)
 --
@@ -65,7 +66,7 @@ web opts j = do
   app <- makeApplication opts j' AppConfig{appEnv = Development
                                           ,appPort = p
                                           ,appRoot = pack u
-                                          ,appHost = HostIPv4
+                                          ,appHost = fromString "*4"
                                           ,appExtra = Extra "" Nothing staticRoot
                                           }
   if server_ opts

hledger-web/hledger-web.cabal

@@ -129,6 +129,7 @@ library
                    , http-client          >= 0.2 && < 0.4
                    , HUnit
                    , network-conduit
+                   , conduit-extra
                    , old-locale
                    , parsec
                    , regexpr              >= 0.5.1
@@ -221,6 +222,7 @@ executable         hledger-web
                    , http-client          >= 0.2 && < 0.4
                    , HUnit
                    , network-conduit
+                   , conduit-extra
                    , old-locale
                    , parsec
                    , regexpr              >= 0.5.1