Fix: mention our websites with https:// (instead of http://) (#8657)

It is 2021. Nobody should advertise http anymore. Not even us.

src/misc_gui.cpp

@@ -510,7 +510,7 @@ struct AboutWindow : public Window {
 
 	void SetStringParameters(int widget) const override
 	{
-		if (widget == WID_A_WEBSITE) SetDParamStr(0, "Website: http://www.openttd.org");
+		if (widget == WID_A_WEBSITE) SetDParamStr(0, "Website: https://www.openttd.org");
 		if (widget == WID_A_COPYRIGHT) SetDParamStr(0, _openttd_revision_year);
 	}
 

src/network/network_content_gui.cpp

@@ -325,7 +325,7 @@ class NetworkContentListWindow : public Window, ContentCallback {
 		char url[1024];
 		const char *last = lastof(url);
 
-		char *pos = strecpy(url, "http://grfsearch.openttd.org/?", last);
+		char *pos = strecpy(url, "https://grfsearch.openttd.org/?", last);
 
 		if (this->auto_select) {
 			pos = strecpy(pos, "do=searchgrfid&q=", last);