Add ability to delete the email attachment after sending it.

includes/install/scripts/email.lua

@@ -45,8 +45,9 @@
 	subject = argv[3];
 	body = argv[4];
 	file = argv[5];
-	--convert_cmd = argv[6];
-	--convert_ext = argv[7];
+	delete = argv[6];
+	--convert_cmd = argv[7];
+	--convert_ext = argv[8];
 
 --replace the &#39 with a single quote
 	body = body:gsub("'", "'");
@@ -80,3 +81,8 @@
 				);
 		end
 	end
+
+--delete the file
+	if (delete == "true") then
+		os.remove(file);
+	end