Add. mail templates for fax server responses.

resources/install/scripts/resources/functions/file_exists.lua

@@ -1,6 +1,8 @@
 
 --check if a file exists
 	function file_exists(name)
-		local f=io.open(name,"r")
-		if f~=nil then io.close(f) return true else return false end
+		local f = io.open(name, "r")
+		if not f then return end
+		f:close()
+		return name
 	end