improve uuid mismatch message

Remote/GCrypt.hs

@@ -202,7 +202,7 @@ gCryptSetup mu _ c = go $ M.lookup "gitrepo" c
 						method <- setupRepo gcryptid =<< inRepo (Git.Construct.fromRemoteLocation gitrepo)
 						gitConfigSpecialRemote u c' "gcrypt" (fromAccessMethod method)
 						return (c', u)
-					else error $ "uuid mismatch " ++ show (u, mu, gcryptid)
+					else error $ "uuid mismatch; expected " ++ show mu ++ " but remote gitrepo has " ++ show u ++ " (" ++ show gcryptid ++ ")"
 
 {- Sets up the gcrypt repository. The repository is either a local
  - repo, or it is accessed via rsync directly, or it is accessed over ssh

doc/bugs/problems_with_enableremote_on_gcrypt_remote___40__hosted_with_gitolite__41__/comment_2_1bb55c9a35d9447a31237c8bfa24dba9._comment

@@ -0,0 +1,21 @@
+[[!comment format=mdwn
+ username="joey"
+ subject="""comment 2"""
+ date="2014-10-28T19:40:37Z"
+ content="""
+The uuid mismatch message tells me that you have tried to enable a special
+remote that has uuid 984e0333-3327-5f21-87a1-35d30f37f337. However, when
+it checked the gcrypt repository, it found that it had gcrypt id
+":id:8sucFsBZIGQKXFv5ecSW", which means its uuid should be
+78104a6f-16a9-504b-8e8a-d8a3c59351e8. I have improved that message to be
+more clear.
+
+Since `git annex info` doesn't list that
+78104a6f-16a9-504b-8e8a-d8a3c59351e8 uuid at all, it seems that
+this gcrypt repository has not been initialized using `git-annex
+initremote`. It's not a gcrypt special remote, but instead is a gcrypt
+repository, that was probably created using `git push`. You can convert it
+to a gcrypt special remote by running `git-annex initremote` and providing
+its repourl. Once that's done and pushed, you will be able to `git annex
+enableremote` it elsewhere.
+"""]]