convert all per-uuid log files to use Builder

Mostly didn't push the ByteStrings down very deep, but all of these log
files are not written to frequently at all, so slight remaining
innefficiency doesn't matter.

In Logs.UUID, removed the fixBadUUID code that cleaned up after a bug in
git-annex versions 3.20111105-3.20111110. In the unlikely event that a repo was
last touched by that ancient git-annex version, the descriptions of remotes
would appear missing when used with this version of git-annex. That is such minor
breakage, and so unlikely to still be a problem for any repos, that it was not
worth forward-porting that code to ByteString.

Types/UUID.hs

@@ -14,6 +14,7 @@ import qualified Data.Map as M
 import qualified Data.UUID as U
 import Data.Maybe
 import Data.String
+import Data.ByteString.Builder
 
 import Utility.FileSystemEncoding
 import qualified Utility.SimpleProtocol as Proto
@@ -54,6 +55,9 @@ instance ToUUID String where
 instance ToUUID U.UUID where
 	toUUID = toUUID . U.toASCIIBytes
 
+buildUUID :: UUID -> Builder
+buildUUID (UUID b) = byteString b
+
 isUUID :: String -> Bool
 isUUID = isJust . U.fromString
 
@@ -67,6 +71,9 @@ fromUUIDDesc (UUIDDesc d) = decodeBS d
 toUUIDDesc :: String -> UUIDDesc
 toUUIDDesc = UUIDDesc . encodeBS
 
+buildUUIDDesc :: UUIDDesc -> Builder
+buildUUIDDesc (UUIDDesc b) = byteString b
+
 type UUIDDescMap = M.Map UUID UUIDDesc
 
 instance Proto.Serializable UUID where