Cancel local account network activity when told to shutdown by the OS. Issue #1232

Frameworks/Account/LocalAccount/LocalAccountDelegate.swift

@@ -32,7 +32,7 @@ final class LocalAccountDelegate: AccountDelegate {
 	}
 	
 	func cancelAll(for account: Account) {
-		// TODO: implement me
+		refresher.cancelAll()
 	}
 	
 	func refreshAll(for account: Account, completion: @escaping (Result<Void, Error>) -> Void) {

Frameworks/Account/LocalAccount/LocalAccountRefresher.swift

@@ -28,6 +28,11 @@ final class LocalAccountRefresher {
 		self.completion = completion
 		downloadSession.downloadObjects(feeds as NSSet)
 	}
+	
+	public func cancelAll() {
+		downloadSession.cancelAll()
+	}
+	
 }
 
 // MARK: - DownloadSessionDelegate