avoid stomping on existing description when enabling a special remote

Happened with eg, gcrypt remotes.

Assistant/MakeRemote.hs

@@ -100,7 +100,8 @@ setupSpecialRemote name remotetype config mcreds (mu, c) = do
 	 - to perform IO actions to refill the pool. -}
 	(c', u) <- R.setup remotetype mu mcreds $
 		M.insert "highRandomQuality" "false" $ M.union config c
-	describeUUID u name
+	whenM (isNothing . M.lookup u <$> uuidMap) $
+		describeUUID u name
 	configSet u c'
 	return name
 

debian/changelog

@@ -3,8 +3,9 @@ git-annex (5.20140530) UNRELEASED; urgency=medium
   * webapp: When adding a new local repository, fix bug that caused its
     group and preferred content to be set in the current repository,
     even when not combining.
-  * webapp: Avoid stomping on existing group and preferred content settings
-    when enabling or combining with an already existing remote.
+  * webapp: Avoid stomping on existing description, group and
+    preferred content settings when enabling or combining with
+    an already existing remote.
 
  -- Joey Hess <joeyh@debian.org>  Thu, 29 May 2014 20:10:59 -0400