What is the “LWP” Perl module?
LWP means “Library WWW Perl.” It’s the standard library for doing Internet and World Wide Web things, including ftp, and http (and https if you download and compile the necessary encryption dependencies). It’s used by security_patch_check to ftp the necessary data automatically. By the way, security_patch_check will complain if these dependencies are not installed correctly so that Perl can access them.