rename fsckKey to verifyKeyContent

No behavior changes.

Backend/Hash.hs

@@ -53,7 +53,7 @@ genBackend :: Hash -> Backend
 genBackend hash = Backend
 	{ name = hashName hash
 	, getKey = keyValue hash
-	, fsckKey = Just $ checkKeyChecksum hash
+	, verifyKeyContent = Just $ checkKeyChecksum hash
 	, canUpgradeKey = Just needsUpgrade
 	, fastMigrate = Just trivialMigrate
 	, isStableKey = const True

Backend/URL.hs

@@ -22,7 +22,7 @@ backend :: Backend
 backend = Backend
 	{ name = "URL"
 	, getKey = const $ return Nothing
-	, fsckKey = Nothing
+	, verifyKeyContent = Nothing
 	, canUpgradeKey = Nothing
 	, fastMigrate = Nothing
 	-- The content of an url can change at any time, so URL keys are

Backend/WORM.hs

@@ -21,7 +21,7 @@ backend :: Backend
 backend = Backend
 	{ name = "WORM"
 	, getKey = keyValue
-	, fsckKey = Nothing
+	, verifyKeyContent = Nothing
 	, canUpgradeKey = Nothing
 	, fastMigrate = Nothing
 	, isStableKey = const True