Cabal revisions of dns-0.3.4

Hackage metadata revisions edit the .cabal file after upload; each diff below is one revision.

 Name:                   dns Version:                0.3.4+x-revision: 1 Author:                 Kazu Yamamoto <kazu@iij.ad.jp> Maintainer:             Kazu Yamamoto <kazu@iij.ad.jp> License:                BSD3                       , enumerator                       , iproute >= 1.2.4                       , mtl-                      , network >= 2.3+                      , network >= 2.3 && < 2.9                       , network-enumerator                       , random   else