Add annex-trustlevel configuration settings, which can be used to override the trust level of a remote.

This overrides the trust.log, and is overridden by the command-line trust
parameters.

It would have been nicer to have Logs.Trust.trustMap just look up the
configuration for all remotes, but a dependency loop prevented that
(Remotes depends on Logs.Trust in several ways). So instead, look up
the configuration when building remotes, storing it in the same forcetrust
field used for the command-line trust parameters.

Config.hs

@@ -12,6 +12,8 @@ import qualified Git
 import qualified Git.Config
 import qualified Git.Command
 import qualified Annex
+import qualified Logs.Trust
+import Types.TrustLevel
 
 type ConfigKey = String
 
@@ -30,7 +32,7 @@ getConfig r key def = do
 	def' <- fromRepo $ Git.Config.get ("annex." ++ key) def
 	fromRepo $ Git.Config.get (remoteConfig r key) def'
 
-{- Looks up a per-remote config setting in git config. -}
+{- A per-remote config setting in git config. -}
 remoteConfig :: Git.Repo -> ConfigKey -> String
 remoteConfig r key = "remote." ++ fromMaybe "" (Git.remoteName r) ++ ".annex-" ++ key
 
@@ -67,9 +69,7 @@ prop_cost_sane = False `notElem`
 	, semiCheapRemoteCost + encryptedRemoteCostAdj < expensiveRemoteCost
 	]
 
-{- Checks if a repo should be ignored, based either on annex-ignore
- - setting, or on command-line options. Allows command-line to override
- - annex-ignore. -}
+{- Checks if a repo should be ignored. -}
 repoNotIgnored :: Git.Repo -> Annex Bool
 repoNotIgnored r = not . Git.configTrue <$> getConfig r "ignore" "false"
 
@@ -83,3 +83,8 @@ getNumCopies v = perhaps (use v) =<< Annex.getState Annex.forcenumcopies
 			readMaybe <$> fromRepo (Git.Config.get config "1")
 		perhaps fallback = maybe fallback (return . id)
 		config = "annex.numcopies"
+
+{- Gets the trust level set for a remote in git config. -}
+getTrustLevel :: Git.Repo -> Annex (Maybe TrustLevel)
+getTrustLevel r = maybe Nothing Logs.Trust.trustName <$>
+	fromRepo (Git.Config.getMaybe (remoteConfig r "trustlevel"))