add remote.<name>.annex-config-uuid

for use by sameas remotes

Types/GitConfig.hs

@@ -246,6 +246,7 @@ data RemoteGitConfig = RemoteGitConfig
 	, remoteAnnexRetry :: Maybe Integer
 	, remoteAnnexRetryDelay :: Maybe Seconds
 	, remoteAnnexAllowUnverifiedDownloads :: Bool
+	, remoteAnnexConfigUUID :: Maybe UUID
 
 	{- These settings are specific to particular types of remotes
 	 - including special remotes. -}
@@ -308,6 +309,7 @@ extractRemoteGitConfig r remotename = do
 			<$> getmayberead "retrydelay"
 		, remoteAnnexAllowUnverifiedDownloads = (== Just "ACKTHPPT") $
 			getmaybe ("security-allow-unverified-downloads")
+		, remoteAnnexConfigUUID = toUUID <$> getmaybe "config-uuid"
 		, remoteAnnexShell = getmaybe "shell"
 		, remoteAnnexSshOptions = getoptions "ssh-options"
 		, remoteAnnexRsyncOptions = getoptions "rsync-options"

doc/git-annex.mdwn

@@ -1268,6 +1268,11 @@ Remotes are configured using these settings in `.git/config`.
 
   git-annex caches UUIDs of remote repositories here.
 
+* `remote.<name>.annex-config-uuid`
+
+  Used for some special remotes, points to a different special remote
+  configuration to use.
+
 * `remote.<name>.annex-retry`, `annex.retry`
 
   Configure retries of failed transfers on a per-remote and general