Version 4.14.13: Always send webpages optionally.

If the link cannot be displayed everywhere
(channel blocked in some countries) the
send request without `optional` flag fails.

Telegram/SourceFiles/data/data_histories.cpp

@@ -93,7 +93,7 @@ MTPInputMedia WebPageForMTP(
 		bool required) {
 	using Flag = MTPDinputMediaWebPage::Flag;
 	return MTP_inputMediaWebPage(
-		MTP_flags((required ? Flag() : Flag::f_optional)
+		MTP_flags(((false && required) ? Flag() : Flag::f_optional)
 			| (draft.forceLargeMedia ? Flag::f_force_large_media : Flag())
 			| (draft.forceSmallMedia ? Flag::f_force_small_media : Flag())),
 		MTP_string(draft.url));