https set extension:server_name (#1960)

Co-authored-by: root <root@DESKTOP-5DF4NN3.localdomain>

lualib/http/httpc.lua

@@ -95,7 +95,7 @@ local function connect(host, timeout)
 		end)
 	end
 	if interface.init then
-		interface.init()
+		interface.init((header and header.Host) or host)
 	end
 	return fd, interface, host
 end